Etymology
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way-out (adj.)

1868, "far off," from way (adv.), short for away, + out. Sense of "original, bold," is jazz slang from 1940s, probably suggesting "far off" from what is conventional or expected.

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Definitions of way-out

way-out (adj.)
(informal) strikingly unconventional;
Synonyms: far-out / kinky / offbeat / quirky
From wordnet.princeton.edu

Dictionary entries near way-out

way

wayfarer

wayfaring

waylay

Wayne

way-out

wayside

wayward

we

*we-

weak