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English definition of “out-box”

out-box

noun [C]     /ˈaʊtbɒks/ (also outbox)
the place on a computer where email messages that you are going to send are kept Internet terminology and abbreviations
US (UK out-tray) a container where you keep letters and documents that you want to send to someone Office equipmentCommunicating by telephonePaper and stationery
(Definition of out-box noun from the Cambridge Learner's Dictionary © Cambridge University Press)

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