try on transitive verb 1.: to put on (a garment) in order to ascertain the fit 2.: to use or test experimentally especially to determine convenience or simplicity of operation 3.Britain: to attempt to impose upon a person : try to outwit a person by means of < if you'd tried on anything funny, he'd have said so — Robert Westerby > < I am not the right woman to try this on with — Elizabeth Bowen >