What is the meaning of sick?

noun

• People who are sick.
  • usage: "they devote their lives to caring for the sick"

verb

• Eject the contents of the stomach through the mouth.
  • usage: "After drinking too much, the students vomited"; "He purged continuously"; "The patient regurgitated the food we gave him last night"
  • synonyms: vomit, vomit up, purge, cast, cat, be sick, disgorge, regorge, retch, puke, barf, spew, spue, chuck, upchuck, honk, regurgitate, throw up

adjective

• Affected by an impairment of normal physical or mental function.
  • usage: "ill from the monotony of his suffering"
  • synonyms: ill
• Feeling nausea; feeling about to vomit.
  • synonyms: nauseated, nauseous, queasy, sickish
• Affected with madness or insanity.
  • usage: "a man who had gone mad"
  • synonyms: brainsick, crazy, demented, disturbed, mad, unbalanced, unhinged
• Having a strong distaste from surfeit.
  • usage: "grew more and more disgusted"; "fed up with their complaints"; "sick of it all"; "sick to death of flattery"; "gossip that makes one sick"; "tired of the noise and smoke"
  • synonyms: disgusted, fed up, sick of, tired of
• Of light. ( lacking in intensity or brightness; dim or feeble)
  • usage: "the pale light of a half moon"; "a pale sun"; "the late afternoon light coming through the el tracks fell in pale oblongs on the street"; "a pallid sky"; "the pale (or wan) stars"; "the wan light of dawn"
  • synonyms: pale, pallid, wan
• Deeply affected by a strong feeling.
  • usage: "sat completely still, sick with envy"; "she was sick with longing"
• Shockingly repellent; inspiring horror.
  • usage: "ghastly wounds"; "the grim aftermath of the bombing"; "the grim task of burying the victims"; "a grisly murder"; "gruesome evidence of human sacrifice"; "macabre tales of war and plague in the Middle ages"; "macabre tortures conceived by madmen"
  • synonyms: ghastly, grim, grisly, gruesome, macabre