k
1 of 4noun
ˈkā 
plural k's or ks ˈkāz
often capitalized, often attributive
1
a
: the 11th letter of the English alphabet
b
: a graphic representation of this letter
c
: a speech counterpart of orthographic k
2
: a graphic device for reproducing the letter k
3
: one designated k especially as the 11th in order or class
4
: something shaped like the letter K
5
: a unit vector parallel to the z-axis
6
[kilo-] : thousand
a salary of $24K
7
[kilo-] : a unit of computer storage capacity equal to 1024 bytes
uses 350K of disk space
8
capitalized [struck] : strikeout
k
2 of 4abbreviation (1)
1
karat
2
kindergarten
3
king
4
kitchen
5
knit
6
knot
7
koruna
8
kosher —often enclosed in a circle
9
kyat
K
3 of 4abbreviation (2)
1
Kelvin
2
kilometer
K
4 of 4symbol
potassium
Example Sentences
Noun There is one k in “book.” The word ends in k. She earned a salary of $30K. The program uses 350K of disk space. The pitcher had more than 10 Ks in his last game.
Word History
Etymology
Symbol
New Latin kalium
First Known Use
Noun
before the 12th century, in the meaning defined at sense 1a
Kids Definition
k
noun
ˈkā
plural k's or ks
ˈkāz
often capitalized
1
: the eleventh letter of the English alphabet
2
: thousand entry 1 sense 1
3
: kilobyte
Medical Definition
K
symbol
1
dissociation constant; ionization constant
2
[New Latin kalium] potassium
3
kelvin