major
adjective
1 the major English poets:
greatest, best, finest, most important, chief, main, prime, principal, capital, cardinal, leading, star, foremost, outstanding, first-rate, top-tier, notable, eminent, preeminent, arch-, supreme, uppermost.
▷antonyms minor.
2 an issue of major importance:
crucial, vital, great, considerable, paramount, utmost, prime, extensive.
▷antonyms little; unimportant.