Etymology
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expeditious (adj.)

late 15c., expedycius "useful, fitting," from Latin expeditus "disengaged, ready, convenient, prompt; unfettered, unencumbered," past participle of expedire (see expedite). Meaning "speedy, speedily accomplished" is from 1590s. Related: Expeditiously; expeditiousness.

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Definitions of expeditious

expeditious (adj.)
marked by speed and efficiency;
From wordnet.princeton.edu