Definitions

from the GNU version of the Collaborative International Dictionary of English.

  • noun A usually horizontal slot in a door through which mail can be delivered. It often has a hinged cover to keep the opening cloised when not in use.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • noun A slot in a wall or door through which mail is delivered.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • noun a slot (usually in a door) through which mail can be delivered

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