at once
1. without delay or hesitation; with no time intervening (Freq. 24) - he answered immediately - found an answer straightaway - an official accused of dishonesty should be suspended forthwith - Come here now! • Syn: immediately, instantly, straightaway, straight off, directly, now, right away, forthwith, like a shot • Derived from adjective: immediate (for: immediately) 2. simultaneously (Freq. 9) - he took three cookies at a time • Syn: at a time, at one time
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