a boxlike tray, basket, or the like, as on a desk, for holding outgoing mail, messages, or work.
- Also called out-basket.
How to use outbox in a sentence
And then you discover the mistake only after the statement has departed the outbox.
He could outrun, outride and outbox any boy of either side the Potomac, and had proved it in many contests of skill.Historic Boyhoods | Rupert Sargent Holland
British Dictionary definitions for outbox
(on a computer) a folder in a mailbox in which outgoing messages are stored and displayed
a US and Canadian name for out-tray
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012