backdoor

Definitions of backdoor

1. noun

   an entrance at the rear of a building
   synonyms: back door, back entrance

   type of:

   exterior door, outside door

   a doorway that allows entrance to or exit from a building
2. noun

   a secret or underhand means of access (to a place or a position)
   synonyms: back door

   type of:

   access

   the act of approaching or entering
3. noun

   an undocumented way to get access to a computer system or the data it contains
   synonyms: back door

   type of:

   access, access code

   a code (a series of characters or digits) that must be entered in some way (typed or dialed or spoken) to get the use of something (a telephone line or a computer or a local area network etc.)