Definition of kos:
(n) :
An island of the Dodecanese, Greece.
(n) :
Alternative spelling of coss. [(British India, South Asia) A measure of distance, varying from one and a quarter to two and a half English miles.]
(n) :
Initialism of knowledge organization system.
(n) :
Initialism of knowledge organization structure.
(n) :
(computing) Initialism of kernel operating system.
(v) :
(video games) Initialism of kill on sight: used in addition to a target player's username to alert teammates of a suspicious player that should be killed when seen.