Synonyms of meaningful

1 Syllable

clear, deep, big

2 Syllables

big-deal, succinct, gravest, meaty, meatiest, big-gun, big-wheel, hot-dog, exact, cogent, soulful, stand-out, meatier, moving, pregnant, valid, graver, pointful, vivid, pithy, pointed, weighty, doozie, heavy, pithier, serious, namest, vital, pithiest, splasher, hotdog, namer, front-page

3 Syllables

important, frontpage, giveaway, relevant, concise, mind-bending, influential, grim-faced, sobering, substantial, well-spoken, marrowy, newsworthy, momentous, sententious, life-or-death, explicit, essential, material, telltale, worthwhile, earth-shaking, eloquent, life-and-death, coherent, earthshaking, bigtime, short-and-sweet, useful

4 Syllables

suasive, allusive, earthshattering, unamusing, expressive, coal-and-ice, name-of-the-game, all-important, consequential, earth-shattering, memorable, purposeful, suggestive, noteworthy

5 Syllables

stimulative, considerable, indicative, applicative, unforgettable, intelligible, articulate, inspirational