I. (ˈ)kā|ō abbreviation or noun
( plural KO's -ōz)
Usage: sometimes not capitalized
: knockout
II. transitive verb
( KO'd -ōd ; KO'd ; KO'ing ; KO's )
Usage: sometimes not capitalized
: to knock out
III. abbreviation
keep off
I. (ˈ)kā|ō abbreviation or noun
( plural KO's -ōz)
Usage: sometimes not capitalized
: knockout
II. transitive verb
( KO'd -ōd ; KO'd ; KO'ing ; KO's )
Usage: sometimes not capitalized
: to knock out
III. abbreviation
keep off
Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012