mail·box 
(mālbŏks′)
(mālbŏks′)n.
1. A public container for deposit of outgoing mail. Also called postbox.
2. A private box for incoming mail. Also called letterbox.
3. A computer file or set of files for the collection and storage of email.
- divestiture
- divestment
- dividable
- divide
- uncertainly
- uncertainness
- uncertainty
- uncertainty principle
- uncertified
- unchain
- unchainable
- unchallengeable
- unchallengeably
- unchangeability
- unchangeable
- unchangeableness
- unchangeably
- unchanging
- unchangingly
- unchangingness
- uncharacteristic
- uncharacteristically
- uncharged
- uncharitable
- uncharitableness