Definition of front doors:
(n) :
(literal) The door at the main entrance to a building or house, normally fronts onto a street.
(n) :
(by extension) The entire main entrance to a building or house.
(n) :
The habitual or designated main entrance to a room that has more than one door.
(n) :
(computing) The normal portal page to a website.
(n) :
(baseball) The path of a pitch which starts inside and then slides over the plate.
(n) :
(slang) vagina or penis, as a means of sexual intercourse, contrasted with the anus or "back door"