LIFETIME /ˈlaɪftaɪm/ ► audio Scrabble 13 Words With Friends 15 Definition noun the period during which something is functional (as between birth and death). — synonyms: life, life-time, lifespan Examples “I've been waiting a lifetime for a train.” See all 70 words you can make from LIFETIME → 8-letter words Words starting with L Words ending with E ← Unscramble different letters