BrE BrE//ˌwaʊˈiː//; NAmE NAmE//ˌwaʊˈiː//) (informal) used to express great surprise or admiration Wow! You look terrific! More Like This Exclamations aargh, ah, aha, ahchoo, ahem, aw, bah, boo, coo, d’oh, eek, eh, er, eww, gee, ha, hey, ho ho, ho-hum, hooray, huh, mm, oh, oho, oi, ooh, oops, ouch, ow, oy, pah, phew, psst, sh, tsk tsk, tut, ugh, uh, uh-uh, uh-oh, um, whoopee, whoops, woo hoo, wow, yay, yippee, yuck, yumSee worksheet. Word Origin sense 1natural exclamation: first recorded in Scots in the early 16th cent. sense 2 1930s: imitative.