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majoradjective big, chief, comprehensive, considerable, crucial, decisive, distinguished, enormous, essential, extensive, extraordinary, far-reaching, fateful, goodly, grave, great, high-level, important, impressive, intense, key, large, leading, massive, matchless, material, memorable, meritorious, moderately large, momentous, notable, noteworthy, outstanding, ponderous, pressing, prime, principal, remarkable, serious, significant, sizable, sober, solemn, substantial, supreme, top, top-level, tremendous, unparalleled, vital, weighty, worthy of consideration, worthy of remark
See also: cardinal, central, critical, crucial, essential, important, indispensable, key, material, momentous, outstanding
MAJOR, persons. One who has attained his full age, and has acquired all his civil rights; one who is no longer a minor; an adult.
MAJOR. Military language. The lowest of the staff officers; a degree higher than captain.