sick

Concise Oxford English Dictionary © 2008 Oxford University Press:
sick1

▶adjective

• 1 affected by physical or mental illness.

• 2 feeling nauseous and wanting to vomit.

■ informal disappointed, mortified, or miserable.

■ archaic pining or longing.

• 3 (sick of) bored by or annoyed with through excessive exposure.

• 4 informal (of humour) dealing offensively with unpleasant subjects.

  ■ having abnormal or unnatural tendencies; perverted.

• 5 informal excellent.

▶noun Brit. informal vomit. ▶verb (sick something up) Brit. informal bring something up by vomiting.

– phrases
be sick

• 1 be ill.

• 2 Brit. vomit.

get sick

• 1 be ill.

• 2 N. Amer. vomit.

sick to one's stomach

• 1 nauseous.

• 2 disgusted.

– derivatives
sickish adjective.

– origin OE sēoc, of Gmc origin.

Concise Oxford English Dictionary © 2008 Oxford University Press:
sick2

▶verb

• 1 (sick something on) set a dog on.

• 2 (sick someone on) informal set someone to pursue, keep watch on, or accompany.

– origin C19: dial. var. of seek.