KO

n. a knockout; a blow that renders the opponent unconscious; -- used especially in boxing. [ acronym ]
Syn. -- knockout. [ WordNet 1.5 ]

n. (Zool.) Same as Coaita. [ 1913 Webster ]

n. A tailless furry marsupial (Phascolarctos cinereus), found in Australia. The female carries her young on the back of her neck. Called also Australian bear, koala bear, native bear, and native sloth. The koala lives almost all of its life in trees, moves sluggishly like a sloth, and eats eucalyptus leaves almost exclusively. [ 1913 Webster +PJC ]

{ , n. (Zool.) Any one of several species of African antelopes of the genus Kobus, esp. the species Kobus sing-sing. [ 1913 Webster ]

n. See Cobalt. [ 1913 Webster ]

n. [ From Franz von Kobell, of Munich. ] (Min.) A blackish gray mineral, a sulphide of antimony, bismuth, and lead. [ 1913 Webster ]

n. [ G., perh. orig., house god, hose protector. See Cobalt ] A kind of domestic spirit in German mythology, corresponding to the Scottish brownie and the English Robin Goodfellow. [ 1913 Webster ]

adj. [ from KO, v. t. ] rendered unconscious, usually by a blow.
Syn. -- knocked out(predicate), kayoed, out(predicate), stunned. [ WordNet 1.5 ]