1. within a short period; before long: soon after dark. 2. promptly; quickly: Finish as soon as you can. 3. readily or willingly: I would as soon walk as ride. 4. Obs. immediately; at once; forthwith. 1. sooner or later, sometime; eventually. 2. would or had sooner, to prefer to: I would sooner not go. Compare rather (def. 7). More @Wikipedia
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