A Front

1. The foremost side of something or the end that faces the direction it normally moves.
2. The side of a building with the main entrance.
3. A field of activity. c face of some other, covert group.
4. Officially it's a dry-cleaning shop, but everyone knows it's a front for the mafia.
5. (meteorology) The interface or transition zone between two airmasses of different density, often resulting in precipitation. Since the temperature distribution is the most important regulator of atmospheric density, a front almost invariably separates airmasses of different temperature.
6. (military) An area where armies are engaged in conflict, especially the line of contact.
7. (military) The lateral space occupied by an element measured from the extremity of one flank to the extremity of the other flank.
8. (military) The direction of the enemy.
9. (military) When a combat situation does not exist or is not assumed, the direction toward which the command is faced.
10. (obsolete) A major military subdivision of the Soviet Army.
11. (dated) Cheek; boldness; impudence.
12. (informal) An act, show, façade, persona: an intentional and false impression of oneself.
13. (historical) That which covers the foremost part of the head: a front piece of false hair worn by women.
14. The most conspicuous part.
15. (obsolete) The beginning.
16. (Britain) a seafront or coastal promenade.
17. (obsolete) The forehead or brow, the part of the face above the eyes; sometimes, also, the whole face.
18. (slang, hotels, dated) The bellhop whose turn it is to answer a client's call, which is often the word "front" used as an exclamation.
19. (slang, in the plural) A grill (jewellery worn on front teeth).

fore

back

rear