Serving to expedite or speed up; designed to make something happen faster.
From 'expedite' + '-ive' (having the quality of or tending to). The '-ive' suffix creates adjectives meaning 'tending toward' the root action.
Expeditive is rare and technical—you'll mainly see it in formal documents and business writing. It's the adjective form emphasizing the *purpose* of speeding things up, rather than just describing speed itself.
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