(statistics) A statistical test for deciding whether a data point is an outlier.

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.

To fly an aircraft in order to evaluate its performance

To drive a motor vehicle in order to evaluate it, especially before potential purchase. / (by extension) To try out a product before committing to purchasing it.

Applied to premium gasoline. / (humorous, by extension) Of coffee: not decaffeinated. / Of a high standard.

(idiomatic) Alternative form of testbed

plural of litmus test

(engineering) Either a static or dynamic test of the relative density of sand, silt, etc. using a penetrometer.

A test in which a potential consumer is asked to determine blindly which of three similar items is not identical to the other two.

(medicine) A medical test in which a sample of saliva is analyzed, often in order to measure a person's hormone levels; such a test administered to an athlete in order to conclusively determine gender.