Definition of "Sick" :

noun: people who are sick

"They devote their lives to caring for the sick."

verb: eject the contents of the stomach through the mouth

adjective: shockingly repellent; inspiring horror

adjective: deeply affected by a strong feeling

"Sat completely still, sick with envy."

adjective: having a strong distaste from surfeit

"Sick of it all."

adjective: affected with madness or insanity

adjective: (of light) lacking in intensity or brightness; dim or feeble

adjective: affected by an impairment of normal physical or mental function

adjective: feeling nausea; feeling about to vomit