The Collaborative International Dictionary of English v.0.48:

Fill \Fill\, n. [See Thill.]
   One of the thills or shafts of a carriage. --Mortimer.
   [1913 Webster]

   Fill horse, a thill horse. --Shak.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Fill \Fill\, v. t. [imp. & p. p. Filled; p. pr. & vb. n.
   Filling.] [OE. fillen, fullen, AS. fyllan, fr. full full;
   akin to D. vullen, G. f["u]llen, Icel. fylla, Sw. fylla, Dan.
   fylde, Goth. fulljan. See Full, a.]
   1. To make full; to supply with as much as can be held or
      contained; to put or pour into, till no more can be
      received; to occupy the whole capacity of.
      [1913 Webster]

            The rain also filleth the pools.      --Ps. lxxxiv.
                                                  6.
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            Jesus saith unto them, Fill the waterpots with
            water. Anf they filled them up to the brim. --John
                                                  ii. 7.
      [1913 Webster]

   2. To furnish an abudant supply to; to furnish with as mush
      as is desired or desirable; to occupy the whole of; to
      swarm in or overrun.
      [1913 Webster]

            And God blessed them, saying. Be fruitful, and
            multiply, and fill the waters in the seas. --Gen. i.
                                                  22.
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            The Syrians filled the country.       --1 Kings xx.
                                                  27.
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   3. To fill or supply fully with food; to feed; to satisfy.
      [1913 Webster]

            Whence should we have so much bread in the
            wilderness, as to fillso great a multitude? --Matt.
                                                  xv. 33.
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            Things that are sweet and fat are more filling.
                                                  --Bacon.
      [1913 Webster]

   4. To possess and perform the duties of; to officiate in, as
      an incumbent; to occupy; to hold; as, a king fills a
      throne; the president fills the office of chief
      magistrate; the speaker of the House fills the chair.
      [1913 Webster]

   5. To supply with an incumbent; as, to fill an office or a
      vacancy. --A. Hamilton.
      [1913 Webster]

   6. (Naut.)
      (a) To press and dilate, as a sail; as, the wind filled
          the sails.
      (b) To trim (a yard) so that the wind shall blow on the
          after side of the sails.
          [1913 Webster]

   7. (Civil Engineering) To make an embankment in, or raise the
      level of (a low place), with earth or gravel.
      [1913 Webster]

   To fill in, to insert; as, he filled in the figures.

   To fill out, to extend or enlarge to the desired limit; to
      make complete; as, to fill out a bill.

   To fill up, to make quite full; to fill to the brim or
      entirely; to occupy completely; to complete. "The bliss
      that fills up all the mind." --Pope. "And fill up that
      which is behind of the afflictions of Christ." --Col. i.
      24.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Fill \Fill\, n. [AS. fyllo. See Fill, v. t.]
   1. A full supply, as much as supplies want; as much as gives
      complete satisfaction. "Ye shall eat your fill." --Lev.
      xxv. 19.
      [1913 Webster]

            I'll bear thee hence, where I may weep my fill.
                                                  --Shak.
      [1913 Webster]

   2. That which fills; filling; filler; specif., an embankment,
      as in railroad construction, to fill a hollow or ravine;
      also, the place which is to be filled.
      [Webster 1913 Suppl. +PJC]

The Collaborative International Dictionary of English v.0.48:

Fill \Fill\, v. i.
   1. To become full; to have the whole capacity occupied; to
      have an abundant supply; to be satiated; as, corn fills
      well in a warm season; the sail fills with the wind.
      [1913 Webster]

   2. To fill a cup or glass for drinking.
      [1913 Webster]

            Give me some wine; fill full.         --Shak.
      [1913 Webster]

   To back and fill. See under Back, v. i.

   To fill up, to grow or become quite full; as, the channel
      of the river fills up with sand.
      [1913 Webster]

WordNet (r) 3.0 (2006):

fill
    n 1: a quantity sufficient to satisfy; "he ate his fill of
         potatoes"; "she had heard her fill of gossip"
    2: any material that fills a space or container; "there was not
       enough fill for the trench" [syn: filling, fill]
    v 1: make full, also in a metaphorical sense; "fill a
         container"; "fill the child with pride" [syn: fill, fill
         up, make full] [ant: empty]
    2: become full; "The pool slowly filled with water"; "The
       theater filled up slowly" [syn: fill, fill up] [ant:
       discharge, empty]
    3: occupy the whole of; "The liquid fills the container" [syn:
       occupy, fill]
    4: assume, as of positions or roles; "She took the job as
       director of development"; "he occupies the position of
       manager"; "the young prince will soon occupy the throne"
       [syn: fill, take, occupy]
    5: fill or meet a want or need [syn: meet, satisfy, fill,
       fulfill, fulfil]
    6: appoint someone to (a position or a job)
    7: eat until one is sated; "He filled up on turkey" [syn: fill
       up, fill]
    8: fill to satisfaction; "I am sated" [syn: satiate, sate,
       replete, fill]
    9: plug with a substance; "fill a cavity"

Moby Thesaurus II by Grady Ward, 1.0:

307 Moby Thesaurus words for "fill":
   abide by, accommodate, act up to, adhere to, admit, advise, afford,
   allay, answer, assimilate, attend to, bag, bar, barrel,
   battologize, be enfeoffed of, be faithful to, be possessed of,
   be seized of, bellyful, bespread, bind, bloat, block, block up,
   blockade, blow up, boast, bottle, box, brim, bumper, bung, burden,
   can, capacity, carry out, caulk, ceil, charge, chink, chock, choke,
   choke off, choke up, claim, clog, clog up, close, clothe, cloy,
   command, complement, complete, comply with, comprehend, comprise,
   conform to, congest, constipate, contain, contribute, cork,
   count in, cover, cram, crate, crawl with, creep with, crowd, crush,
   dam, dam up, diffuse, discharge, distend, do, do justice to,
   donate, embody, embrace, encircle, enclose, encompass, endow,
   engorge, engorgement, enjoy, enough, envisage, execute, expand,
   extend throughout, face, fatten, feather, fill in, fill out,
   fill to overflowing, fill up, find, flood, follow, foul, freight,
   fulfill, full house, full measure, fullness, fund, fur, furnish,
   give, give an encore, glut, go over, go through, gorge, grow, have,
   have and hold, have in hand, have tenure of, heap, heap up, heed,
   hold, hold by, honeycomb, imbue, include, incorporate, increase,
   inflate, inform, inlay, interline, invest, iterate, jade, jam,
   jam up, jam-pack, keep, keep faith with, know no bounds, lade,
   lading, leave no void, leaven, let in on, line, live up to, load,
   luxuriate, maintain, make available, make good, make out,
   make provision for, mass, meet, more than enough, mouthful, notify,
   number among, observe, obstipate, obstruct, occlude, occupy,
   overabound, overbrim, overdose, overfeed, overfill, overflow,
   overgorge, overgrow, overrun, oversaturate, overspill, overspread,
   overstuff, overswarm, pack, pack away, pad, pall, penetrate,
   permeate, pervade, pile, plenty, plug, plug up, pocket, possess,
   practice, prepare, present, provide, provide for, pug, pullulate,
   ram in, reaffirm, reassert, recapitulate, receive, recite,
   reckon among, reckon in, reckon with, recount, recruit, regard,
   rehash, rehearse, reissue, reiterate, replenish, repletion,
   reprint, respect, restate, resume, retail, retell, review, reword,
   run over, run riot, run through, sack, sate, satiate, satiation,
   satiety, satisfaction, satisfy, saturate, saturatedness,
   saturation, saturation point, say over, say over again, seal,
   share, ship, skinful, slake, snootful, spile, spill over, squat,
   squat on, squeeze, stack, stall, stanch, stand in, stay, stench,
   stock, stodge, stop, stop up, stopper, stopple, store, stow,
   stretch, stuff, stuff up, subsidize, substitute, sufficiency,
   suffuse, sum up, summarize, superabound, supercharge,
   supersaturate, supersaturation, supply, support, surfeit, swarm,
   swarm with, swell, take in, take into account,
   take into consideration, take over, take up, tautologize, teem,
   teem with, tell, top off, transfuse, usucapt, wad, wainscot,
   weight, yield