v. Past tense and past participle of spend.adj. Used up; consumed: a spent youth. adj. Having come to an end; passed: a spent era of opulence. adj. Depleted of energy, force, or strength; exhausted: At the end of the hot day the spent workers slept under a shady tree. adj. Nautical Of or relating to a vessel at the end of a voyage, with fuel, stores, and water consumed and cargo discharged.