All terms

Legal Terms: N

Federal & State Law Editorial TeamLast reviewed: April 2026

N-400

immigration

The Application for Naturalization filed with USCIS by lawful permanent residents seeking to become U.S. citizens, supported by evidence of continuous residence, physical presence, and good moral character.

NACARA

immigration

The Nicaraguan Adjustment and Central American Relief Act of 1997, providing special forms of relief from removal and adjustment of status to certain nationals of Nicaragua, Cuba, El Salvador, Guatemala, and former Soviet bloc countries.

Naked License

intellectual property

A trademark license granted without quality control by the licensor over the licensee's use of the mark, which can result in abandonment of trademark rights.

Narrow-Based Weighted Average

business

A weighted-average anti-dilution formula counting only outstanding preferred (or a narrower base) in the denominator, producing greater protection than broad-based.

National Ambient Air Quality Standards

environmental

EPA standards establishing permissible levels of criteria pollutants in outdoor air to protect public health and welfare under the Clean Air Act.

National Interest Waiver

immigration

An exemption from the labor certification requirement for employment-based immigrants whose work is deemed to be in the national interest of the United States.

National Labor Relations Act

employment

A federal law protecting the rights of employees to organize, form labor unions, bargain collectively, and engage in concerted activity for mutual aid or protection.

National Pollutant Discharge Elimination System

environmental

The permitting program under the Clean Water Act that regulates point source discharges of pollutants into waters of the United States.

Natural Resource Damages

environmental

Monetary compensation for injury to, destruction of, or loss of natural resources caused by a release of hazardous substances, recoverable under CERCLA and the Oil Pollution Act.

Naturalization

immigration

The legal process by which a foreign national becomes a U.S. citizen after meeting eligibility requirements and passing required tests.

Naturalization

immigration

The process by which a lawful permanent resident becomes a U.S. citizen after meeting residency, language, civics, and good moral character requirements.

Naturalization

immigration

The legal process by which a lawful permanent resident becomes a United States citizen, generally requiring at least five years of residence, good moral character, and passage of English and civics tests.

Necessaries

contracts

Goods and services essential for a person's basic needs, such as food, clothing, shelter, and medical care. Contracts for necessaries by minors may be enforceable.

Necessity Defense

criminal procedure

A justification defense permitting otherwise criminal conduct when reasonably necessary to avoid a greater, imminent harm.

Negligence

tort

The failure to exercise the standard of care that a reasonably prudent person would exercise under similar circumstances, resulting in harm to another.

Negligent Misrepresentation

contract law

A false assertion made without reasonable care to ascertain its truth, generally supporting rescission and limited damages for those in commercial relationships.

Negotiation

general

The process of discussion and bargaining between parties to reach a mutually acceptable agreement or settlement.

NEPA

environmental

The National Environmental Policy Act, requiring federal agencies to assess the environmental effects of proposed actions before making decisions.

Net Operating Loss

tax

A loss that occurs when a taxpayer's allowable tax deductions exceed their taxable income in a given year, which may be carried forward to offset future income.

New Source Performance Standards

environmental

EPA regulations establishing emission limitations for new or modified stationary sources of air pollution in specific industrial categories.

Nisi Prius

courts

A trial court, as distinguished from an appellate court. The term refers to the court where a case is first tried.

No Contest

criminal

A plea (nolo contendere) in which the defendant does not admit guilt but accepts punishment. It cannot be used as an admission of liability in a civil case.

Related:pleaguilty

No-Contest Clause

estate planning

A will provision purporting to disinherit any beneficiary who unsuccessfully challenges the will, with varying enforceability across jurisdictions, particularly when probable cause exists for the challenge.

No-Fault Divorce

family law

A dissolution available in every state on grounds such as irreconcilable differences or irretrievable breakdown, requiring no showing of marital misconduct by either spouse.

No-Knock Warrant

criminal procedure

A search warrant authorizing officers to enter premises without first announcing their presence, typically justified by safety or evidence-destruction concerns.

No-oral-modification Clause

contract law

A contractual provision prohibiting oral modifications, given effect under UCC 2-209(2) for sale-of-goods contracts even between merchants.

NOL (Net Operating Loss)

tax

A loss arising when allowable deductions exceed gross income, available to be carried to other tax years under rules that have changed significantly under recent tax legislation.

Nolo Contendere

criminal

Latin for 'I do not wish to contend.' A plea in criminal court similar to guilty but cannot be used as an admission in civil proceedings.

Nolo Contendere

criminal procedure

A plea of no contest, accepting punishment without admitting guilt, which cannot generally be used as an admission in subsequent civil litigation.

Nominal Consideration

contract law

A token amount stated to satisfy the consideration requirement, generally insufficient under the modern rule absent an actual bargained-for exchange.

Non-Compete Agreement

employment

A contractual clause restricting an employee from working for competitors or starting a competing business for a specified period and geographic area after leaving employment.

Non-Compete Agreement

ip

A contractual restriction preventing an employee or business seller from competing with the other party for a specified time and geographic area.

Non-Disclosure Agreement

business

A contract creating a confidential relationship between parties, obligating one or both to keep certain information secret.

Non-Disclosure Agreement

employment

A contract requiring a party to keep certain information confidential, commonly used to protect trade secrets and proprietary business information.

Non-Hearsay

evidence

Out-of-court statements that fall outside the hearsay definition because they are not offered for their truth or are exempted by FRE 801(d).

Non-Immigrant Intent

immigration

The required intention of most temporary visa applicants to reside in the United States only temporarily for a specific purpose before returning home.

Non-Participating Preferred

business

Preferred stock that on a liquidation event receives the greater of its liquidation preference or its as-converted share of proceeds, but not both.

Non-Provisional

intellectual property

A regular U.S. patent application examined on the merits by the USPTO, which can claim priority to an earlier provisional application filed within 12 months.

Non-Refundable Credit

tax

A tax credit that can reduce tax liability only to zero, with any excess generally lost (though some carry over), including the Saver's Credit and foreign tax credit.

Nonattainment Area

environmental

A geographic area where the concentration of a criteria pollutant exceeds the National Ambient Air Quality Standards.

Nonconforming Use

property

A land use that was lawful before a zoning change but no longer complies with current zoning regulations. Generally allowed to continue but not expand.

Nondischargeable Debt

bankruptcy

A debt that cannot be eliminated in bankruptcy, including student loans (absent undue hardship), certain taxes, child support, and debts arising from fraud.

Nonimmigrant Visa

immigration

A visa issued to a foreign national seeking temporary entry to the United States for a specific purpose such as tourism, study, or temporary work.

Nonjudicial Punishment

military

Disciplinary action taken by a commanding officer without a court-martial, authorized under Article 15 of the UCMJ for minor offenses.

Notary Public

general

A person authorized by the state to witness the signing of documents, administer oaths, and certify the authenticity of signatures.

Notice

civil procedure

Formal notification to a party of a legal action, proceeding, or right. Due process requires adequate notice before the government deprives a person of rights.

Notice of Privacy Practices

healthcare

A document that covered entities must provide to patients describing how their protected health information may be used and disclosed and their rights under HIPAA.

Notice to Appear

immigration

A charging document issued by the Department of Homeland Security that initiates removal proceedings by notifying the foreign national of the allegations and charges.

Novation

contract law

A substituted contract that immediately discharges the original obligation by substituting a new party or new obligation, requiring the consent of all parties.

Novation vs Assignment

contract law

The distinction that assignment transfers rights while leaving the assignor liable for duties, whereas novation substitutes a new party and discharges the original.

Novelty

ip

A requirement for patentability meaning the invention must be new and not anticipated by any single prior art reference.

NSO (Non-Qualified Stock Option)

business

A stock option that does not meet ISO requirements and is taxed as ordinary income on the spread between fair market value and exercise price at exercise.

NTA (Notice to Appear)

immigration

The charging document on Form I-862 served by DHS that initiates removal proceedings, specifying the noncitizen's alleged removability and the date of the first immigration court hearing.

Nuisance

property

An unreasonable interference with the use and enjoyment of another person's property. Can be private (affecting one party) or public (affecting the community).

Numerosity

civil procedure

The Rule 23(a)(1) requirement that the class be so numerous that joinder of all members is impracticable, typically satisfied by 40 or more members.

Nuncupative Will

estate

An oral will made during the last illness or in imminent peril of death, valid only in limited circumstances in some states.

Nuncupative Will

estate planning

An oral will spoken in the presence of witnesses, recognized only in very limited circumstances such as last-illness or military exigency in jurisdictions that still permit them.

This is legal information, not legal advice. Laws vary by jurisdiction and change frequently. Always verify current law with official sources and consult a licensed attorney in your jurisdiction for advice on your specific situation.