1. (adj)unimportant not important Synonyms: insignificant Antonyms: historic, primal, grave, great, alpha, of import, in-chief(ip), serious, cardinal, Copernican, essential, of the essence(p), distinguished, strategic, fundamental, burning(a), most-valuable, principal(a), important, measurable, primary(a), grievous, crucial, chief(a), big, all-important(a), outstanding, master(a), weighty, heavy, key, grand, consequential, main(a), all important(p), beta, eventful, central
2. (adj)insignificant, unimportant devoid of importance, meaning, or force Synonyms: peanut, undistinguished, unimportant, insignificant Antonyms: beta, big, grand, burning(a), of the essence(p), eventful, strategic, primal, crucial, primary(a), weighty, chief(a), Copernican, great, consequential, master(a), most-valuable, heavy, central, important, of import, serious, cardinal, principal(a), all-important(a), historic, grave, all important(p), grievous, outstanding, distinguished, main(a), fundamental, measurable, key, essential, alpha, in-chief(ip)
Synonyms, Thesaurus & Antonyms of 'unimportant'
English Synonyms and Antonyms
1. unimportant Vain (L. vanus, empty) keeps the etymological idea through all changes of meaning; a vain endeavor is empty of result, or of adequate power to produce a result, a vain pretension is empty Synonyms: vain, abortive, futile, shadowy, unsatisfying, baseless, idle, trifling, unserviceable, bootless, inconstant, trivial, unsubstantial, deceitful, ineffectual, unavailing, useless, delusive, nugatory, unimportant, vapid, empty, null, unprofitable, visionary, fruitless, profitless, unreal, worthless Antonyms: adequate, effective, powerful, solid, useful, advantageous, efficient, profitable, sound, valid, beneficial, expedient, real, substantial, valuable, competent, potent, serviceable, sufficient, worthy
Synonyms for unimportant 
