ultimate

adjective

1 the decline and ultimate collapse of the Empire:

eventual, last, final, concluding, conclusive, terminal, end, endmost, furthest;

resulting, ensuing, consequent, subsequent.

▷antonyms immediate.

2 ultimate truths about human civilization:

fundamental, basic, primary, prime, elementary, elemental, absolute, actual, definitive, central, key, crucial, vital, essential, pivotal.

▷antonyms peripheral.

3 the ultimate gift for cat lovers:

best, ideal, greatest, supreme, paramount, superlative, highest, unsurpassed, unrivaled, topmost, utmost, optimum, quintessential;

rare apogean.

▷antonyms worst.

noun

a studio apartment offering the ultimate in luxury living:

utmost, optimum, last word, very limit, height, epitome, peak, pinnacle, acme, apex, apogee, zenith, culmination, perfection, nonpareil, extreme, extremity;

French crème de la crème, dernier cri, beau idéal;

Latin ne plus ultra;

informal the best thing since sliced bread, the bee's knees, the cat's pajamas/whiskers;

archaic nonesuch.