Real Dictionary

billet
If members of the armed forces are billeted in a particular place, that place is provided for them to stay in for a period of time.
countable noun: A billet is a house where a member of the armed forces has been billeted.

billet in American English 1
a brief document or letter
to assign to lodging by billet
to be billeted or quartered
intransitive verb: to obtain lodging; stay
noun: lodging for a soldier, student, etc., as in a private home or nonmilitary public building
transitive verb: to direct (a soldier) by ticket, note, or verbal order, where to lodge

billet in American English 2
a short, thick piece of firewood
noun: a small chunk of wood; a short section of a log, esp. one cut for fuel

billet in British English 1
noun: accommodation, esp for a soldier, in civilian lodgings
verb: to assign a lodging to (a soldier)

billet in British English 2
noun: a chunk of wood, esp for fuel

billet in Mechanical Engineering
noun: A billet is a length of metal that has been partly processed but is not in its final state.