(idiomatic) An informal check of an idea or proposal, using one's common sense or sense of propriety.

A fluoroscopic medical test during which the examinee is asked to "sniff" (quickly breathe in through the nose); diaphragm fluoroscopy.

A test for leaks involving blowing smoke into a tube or pipe.

To perform any of the above tests.

Any chemical check for the presence of (usually illegal) drugs in a sample of one's blood, hair or urine.

(transitive) To perform a drug test; the check for the presence of illegal drugs in a sample of blood, hair or urine.

A measurement performed on motor vehicles, required by the DMV, to prevent issuing valid registration if an excessive amount of waste fumes are produced during typical use. Cars typically are placed on a dynamometer to simulate different driving speeds.

To test something using the conditions that it was designed to operate under, especially out in the real world instead of in a laboratory or workshop.

(cricket) A five-day first class match between sides representing the official Test nations. / (rugby union, field hockey) An international match between the teams of two nations.

(cricket) Any of the officially recognised nations who play Test cricket: Australia, Bangladesh, England, India, New Zealand, Pakistan, South Africa, Sri Lanka, the West Indies, and Zimbabwe.