definition of
sick

[1] #1 sick a. [ill] affected by an impairment of normal physical or mental function; "ill from the monotony of his suffering". wn

[2] #2 sick s. [nauseated, nauseous, queasy, sickish] feeling nausea; feeling about to vomit. wn

[3] #3 sick n. people who are sick; "they devote their lives to caring for the sick". wn

[4] #4 sick s. [brainsick, crazy, demented, disturbed, mad, unbalanced, unhinged] affected with madness or insanity; "a man who had gone mad". wn

[5] #5 sick v. [vomit, vomit up, purge, cast, cat, be sick, disgorge, regorge, retch, puke, barf, spew, spue, chuck, upchuck, honk, regurgitate, throw up] eject the contents of the stomach through the mouth; "After drinking too much, the students vomited"; "He purged continuously"; "The patient regurgitated the food we gave him last night". wn