kadj. denoting a quantity consisting of 1,000 items or units ; Kn. street names for ketamine ; Kn. the 11th letter of the Roman alphabet ; Kn. a unit of information equal to 1024 bytes ; Kn. a unit of information equal to 1000 bytes ; Kn. the basic unit of thermodynamic temperature adopted under the Systeme International d'Unites ; Kn. the cardinal number that is the product of 10 and 100 ; Kn. a light soft silver-white metallic element of the alkali metal group ; oxidizes rapidly in air and reacts violently with water ; is abundant in nature in combined forms occurring in sea water and in carnallite and kainite and sylvite ; K particlen. an unstable meson produced as the result of a high-energy particle collision ; K rationn. a small package of emergency rations ; issued to United States troops in World War II ; K'ung Futzun. Chinese philosopher whose ideas and sayings were collected after his death and became the basis of a philosophical doctrine known a Confucianism (circa 551-478 BC) ; k-mesonn. an unstable meson produced as the result of a high-energy particle collision ; K.E.n. the mechanical energy that a body has by virtue of its motion ; K2n. a mountain peak in the Karakoram Range in northern Kashmir ; the 2nd highest peak in the world (28,250 feet high) ; Kan. unknown god ; an epithet of Prajapati and Brahma ;