The Collaborative International Dictionary of English v.0.48:

Billet \Bil"let\, v. t. [imp. & p. p. Billeted; p. pr. & vb.
   n. Billeting.] [From Billet a ticket.] (Mil.)
   To direct, by a ticket or note, where to lodge. Hence: To
   quarter, or place in lodgings, as soldiers in private houses.
   [1913 Webster]

         Billeted in so antiquated a mansion.     --W. Irving.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Billet \Bil"let\, n. [F. billette, bille, log; of unknown
   origin; a different word from bille ball. Cf. Billiards,
   Billot.]
   1. A small stick of wood, as for firewood.
      [1913 Webster]

            They shall beat out my brains with billets. --Shak.
      [1913 Webster]

   2. (Metal.) A short bar of metal, as of gold or iron.
      [1913 Webster]

   3. (Arch.) An ornament in Norman work, resembling a billet of
      wood either square or round.
      [1913 Webster]

   4. (Saddlery)
      (a) A strap which enters a buckle.
      (b) A loop which receives the end of a buckled strap.
          --Knight.
          [1913 Webster]

   5. (Her.) A bearing in the form of an oblong rectangle.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Billet \Bil"let\, n. [F. billet, dim. of an OF. bille bill. See
   Bill a writing.]
   1. A small paper; a note; a short letter. "I got your
      melancholy billet." --Sterne.
      [1913 Webster]

   2. A ticket from a public officer directing soldiers at what
      house to lodge; as, a billet of residence.
      [1913 Webster]

   3. Quarters or place to which one is assigned, as by a billet
      or ticket; berth; position. Also used fig. [Colloq.]
      [1913 Webster]

            The men who cling to easy billets ashore. --Harper's
                                                  Mag.
      [1913 Webster]

            His shafts of satire fly straight to their billet,
            and there they rankle.                --Pall Mall
                                                  Mag.
      [Webster 1913 Suppl.]

The Collaborative International Dictionary of English v.0.48:

Billard \Bil"lard\, n. (Zool.)
   An English fish, allied to the cod; the coalfish. [Written
   also billet and billit.]
   [1913 Webster] Billbeetle

WordNet (r) 3.0 (2006):

billet
    n 1: a short personal letter; "drop me a line when you get
         there" [syn: note, short letter, line, billet]
    2: lodging for military personnel (especially in a private home)
    3: a job in an organization; "he occupied a post in the
       treasury" [syn: position, post, berth, office,
       spot, billet, place, situation]
    v 1: provide housing for (military personnel) [syn: quarter,
         billet, canton]

Moby Thesaurus II by Grady Ward, 1.0:

239 Moby Thesaurus words for "billet":
   achievement, acknowledgment, alerion, anchor, animal charge,
   annulet, answer, appointment, argent, armorial bearings, armory,
   arms, azure, bandeau, bar, bar sinister, baton, beam, bearings,
   bed, bend, bend sinister, berth, bestow, billet at, bivouac,
   blazon, blazonry, board, boarding, bordure, broad arrow, bunk,
   burrow, business letter, cadency mark, camp, canton, chaplet,
   charge, chevron, chief, chit, clapboard, coat of arms, cockatrice,
   colonize, come to anchor, communication, connection, cord,
   cordwood, coronet, crescent, crest, cross, cross moline, crown,
   deal, device, difference, differencing, dispatch, domesticate,
   domicile, domiciliate, driftwood, drop anchor, eagle, employment,
   engagement, ensconce, entertain, epistle, ermine, ermines,
   erminites, erminois, escutcheon, establish residence, falcon,
   favor, fess, fess point, field, file, firewood, flanch,
   fleur-de-lis, fret, fur, fusil, garland, gig, griffin, gules,
   gyron, harbor, hardwood, hatchment, helmet, heraldic device, hive,
   honor point, house, hut, impalement, impaling, incumbency,
   inescutcheon, ingot, inhabit, job, keep house, label, lath,
   lathing, lathwork, letter, line, lion, live at, locate, lodge, log,
   lozenge, lumber, mantling, marshaling, martlet, mascle, message,
   metal, missive, moonlighting, moor, motto, move, mullet, nest,
   nombril point, note, octofoil, office, opening, or, ordinary, orle,
   pale, paly, panelboard, paneling, panelwork, park, pean, people,
   perch, pheon, place, plank, planking, plyboard, plywood, pole,
   populate, position, post, puncheon, purpure, put up, quarter,
   quartering, relocate, reply, rescript, reside, rod, room, roost,
   rose, sable, saltire, scutcheon, second job, service,
   set up housekeeping, set up shop, settle, settle down, shake,
   sheathing, sheathing board, sheeting, shelter, shield, shingle,
   sideboard, siding, sit down, situation, slab, slat, softwood,
   splat, spot, spread eagle, squat, stable, stand, station, stave,
   stay at, stick, stick of wood, stovewood, strike root, strip,
   subordinary, take residence at, take root, take up residence,
   tenne, tenure, three-by-four, timber, timbering, timberwork,
   tincture, torse, tressure, two-by-four, unicorn, vacancy, vair,
   vert, weatherboard, wood, wreath, yale