Quiz: Remember the definition of mal de mer?
early 15c., "trial, experiment, test," from Old French probacion "proof, evidence" (14c., Modern French probation) and directly from Latin probationem (nominative probatio) "approval, assent; a proving, trial, inspection, examination," noun of action from past participle stem of probare "to test" (see prove). Meaning "testing of a person's conduct" (especially as a trial period for membership) is from early 15c.; theological sense first recorded 1520s; criminal justice sense is recorded by 1866. As a verb from 1640s. Related: Probationer; probationary.