Entry 1 sense Webster, 1913 out-of-sight · IPA 01 adj. very good; same as groovy, sense 1. 1. very good; same as groovy, sense 1.[informal, 1960's] See: groovy Syn. bang-up, bully, cool, corking, cracking, dandy, far-out, great, groovy, keen, neat, nifty, not bad(predicate), outtasight, peachy, psychedelic, slap-up, swell, smashing.