The Collaborative International Dictionary of English v.0.48:

Fill \Fill\, n. [See Thill.]
   One of the thills or shafts of a carriage. --Mortimer.
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   Fill horse, a thill horse. --Shak.
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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.
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            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.
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   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.
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            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.
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            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.
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   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.
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   5. To supply with an incumbent; as, to fill an office or a
      vacancy. --A. Hamilton.
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   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.
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   7. (Civil Engineering) To make an embankment in, or raise the
      level of (a low place), with earth or gravel.
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   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.
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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.
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            I'll bear thee hence, where I may weep my fill.
                                                  --Shak.
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   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.
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   2. To fill a cup or glass for drinking.
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            Give me some wine; fill full.         --Shak.
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   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.
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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"