All terms

Legal Terms: K

Federal & State Law Editorial TeamLast reviewed: April 2026

K-1

business

Schedule K-1 is the IRS form by which a partnership, S corporation, estate, or trust reports each partner's, shareholder's, or beneficiary's share of income, deductions, and credits for the year.

K-1 Visa

immigration

A nonimmigrant visa for the fiancé(e) of a U.S. citizen, allowing entry to the United States for the purpose of marriage within 90 days.

Kastigar Hearing

criminal procedure

A pretrial hearing where the government must prove that its evidence comes from legitimate sources wholly independent of the defendant's compelled testimony.

Kidnapping

criminal

The crime of unlawfully seizing and detaining a person against their will, often by force, threat, or deception.

KSR

intellectual property

KSR International Co. v. Teleflex Inc. (2007), the Supreme Court case that loosened the standard for combining prior art references to establish obviousness, rejecting rigid application of the teaching-suggestion-motivation test.

Kumho Extension

evidence

The Supreme Court's holding in Kumho Tire v. Carmichael extending Daubert's gatekeeping role to all expert testimony, including technical and experience-based opinions.

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.