(figuratively) A rigorous test or appraisal of the quality or worth of something. / (historical) In the 1960s, a party based around the use and advocacy of the psychedelic drug LSD ("acid").

A laboratory bench upon which a device is physically tested. / A virtual simulation of a device for the same purpose.

a paper submitted by a student for academic examination / (chemistry) a small piece of paper impregnated with a chemical indicator for making qualitative tests

(chemistry) a glass tube, rounded at one end and open at the other; used for small-scale laboratory tests

(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.

A test of physical fitness in the US military, based on how far a person can run in a set period of time.

produced in a test tube / conceived or developed in vitro by artificial insemination

a test used to establish which cerebral functions are localised to which hemisphere

A measured amount (volume) of a sample being used in a test.

(law) A legal action intended to set a precedent. / (computing) Any of a set of conditions and variables used to test an application.