Past  —adj. 1 gone by in time (in past years; the time is past). 2 recently gone by (the past month). 3 of a former time (past president). 4 gram. Expressing a past action or state. —n. 1 (prec. By the) a past time. B past events (cannot undo the past). 2 person's past life, esp. If discreditable (man with a past). 3 past tense or form. —prep. 1 beyond in time or place (is past two o'clock; lives just past the pub). 2 beyond the range, duration, or compass of (past endurance). —adv. So as to pass by (ran past).  not put it past believe it possible of (a person). Past it colloq. Old and useless. [from *pass1]