Dictionary
back' door'
1. a door at the rear of a house, building, etc.
2. a secret, furtive, or illicit method, manner, or means.
back•door
Pronunciation: (bak'dôr', -dōr'), [key]—
adj.
secret; furtive; illicit; indirect.
Also,back'-door'.Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.