k

Symbol.

  1. Mathematics. a vector on the z-axis, having length 1 unit.

  2. Boltzmann constant.

Words Nearby k

Other definitions for K (2 of 8)

K1

or k

[ key ]
noun,plural K's or Ks, k's or ks.

  1. the eleventh letter of the English alphabet, a consonant.

  2. any sound represented by the letter K or k, as in bilk, kit, or sick.

  1. something having the shape of a K.

  2. a written or printed representation of the letter K or k.

  3. a device, as a printer's type, for reproducing the letter K or k.

Other definitions for K (3 of 8)

K2
abbreviation

  1. the number 1000: The salary offered is $20K.

  2. kilometer, especially in a footrace or wheelchair race on a road or track: She’s training to run her first 10K this summer.

Origin of K

3
Abbreviation of kilo-for def. 1; abbreviation of kilometer for def. 2

Other definitions for K (4 of 8)

K3
abbreviation

  1. Chess. king.

  2. Physics. Kelvin.

  1. Music. Köchel listing.

  2. kindergarten: a K–12 boarding school.

  3. Real Estate. kitchen.

Other definitions for K (5 of 8)

K4
Symbol.

  1. the eleventh in order or in a series.

  2. Computers.

    • the number 1024 or 210: A binary 32K memory has 32,768 positions.

    • kilobyte.

  1. Baseball. strikeout; strikeouts.

  2. Physics. kaon.

  3. Biochemistry. lysine.

  4. Chemistry. potassium.

Origin of K

5
def. 6 from German Kalium

Other definitions for K (6 of 8)

K
abbreviationEcology.

  1. carrying capacity.

Other definitions for k. (7 of 8)

k.
abbreviation

  1. Electricity. capacity.

  2. karat.

  1. kilogram; kilograms.

  2. Chess. king.

  3. knight.

  4. knot.

  5. kopeck.

Other definitions for K. (8 of 8)

K.
abbreviation

  1. kip; kips.

  2. Knight.

  1. kwacha.

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

How to use k in a sentence

British Dictionary definitions for k (1 of 4)

k
symbol for

  1. kilo(s)

  2. maths the unit vector along the z-axis

British Dictionary definitions for k (2 of 4)

k

K

/ (keɪ) /

nounplural k's, K's or Ks

  1. the 11th letter and 8th consonant of the modern English alphabet

  2. a speech sound represented by this letter, usually a voiceless velar stop, as in kitten

  1. See five Ks

British Dictionary definitions for K (3 of 4)

K
abbreviation for

  1. Köchel: indicating the serial number in the catalogue (1862) of the works of Mozart made by Ludwig von Köchel (1800–77)

British Dictionary definitions for K (4 of 4)

K
symbol for

  1. kelvin(s)

  2. chess king

  1. chem potassium

  2. physics kaon

  3. currency

    • kina

    • kip

    • kopeck

    • kwacha

    • kyat

  4. one thousand

  5. computing

    • a unit of 1024 words, bits, or bytes

    • (not in technical usage) 1000

abbreviation for

  1. Cambodia (international car registration)

Origin of K

4
(for sense 3) from New Latin kalium; (for sense 6) from kilo-; (for sense 8) from Kampuchea

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Scientific definitions for K

K

  1. Abbreviation of kelvin

The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

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