lightweight

having little weight it's going to be hot, so wear mostly lightweight clothing Synonyms featherlight, feathery, light, underweight, weightlessRelated Words bantam, diminutive, little, minute, puny, small, smallish, tiny, undersized (also undersize), wee; flimsy, fragile, insubstantial; petite, slender, slight, slim, thinNear Antonyms big, considerable, extensive, goodly, great, handsome, huge, hulking, jumbo, king-size (or king-sized), large, largish, massive, overscale (or overscaled), oversize (or oversized), sizable (or sizeable), substantial, super, voluminous, whacking; bulky, cumbersome, unwieldyAntonyms heavy, hefty, leaden, overweight, ponderous, weighty

a person of no importance or influence among astronomers she's considered a lightweight Synonyms cipher, dwarf, half-pint, insect, insignificancy, nobody, morsel, nonentity, nothing, nullity, number, pip-squeak, pygmy (also pigmy), shrimp, snippersnapper, twerp, whippersnapper, zero, zilchRelated Words no-name, noncelebrity; least; inferior, mediocrity, obscurity; figurehead, puppet; nonpersonNear Antonyms chief, head, lead, leader; celebrity, luminary, notable, personality, planet, star, superstar; authority, superior; great power, party, powerAntonyms big shot, big wheel, bigwig, eminence, figure, kahuna, kingpin, magnate, nabob, personage, somebody, VIP