The Collaborative International Dictionary of English v.0.48:

Lance \Lance\ (l[a^]ns), n. [OE. lance, F. lance, fr. L. lancea;
   cf. Gr. lo`gchh. Cf. Launch.]
   1. A weapon of war, consisting of a long shaft or handle and
      a steel blade or head; a spear carried by horsemen, and
      often decorated with a small flag; also, a spear or
      harpoon used by whalers and fishermen.
      [1913 Webster]

            A braver soldier never couched lance. --Shak.
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   2. A soldier armed with a lance; a lancer.
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   3. (Founding) A small iron rod which suspends the core of the
      mold in casting a shell.
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   4. (Mil.) An instrument which conveys the charge of a piece
      of ordnance and forces it home.
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   5. (Pyrotech.) One of the small paper cases filled with
      combustible composition, which mark the outlines of a
      figure.
      [1913 Webster]

   6. (Med.) A lancet.
      [PJC]

   Free lance, in the Middle Ages, and subsequently, a knight
      or roving soldier, who was free to engage for any state or
      commander that purchased his services; hence, a person who
      assails institutions or opinions on his own responsibility
      without regard to party lines or deference to authority.
      See also freelance, n. and a., and freelancer.

   Lance bucket (Cavalry), a socket attached to a saddle or
      stirrup strap, in which to rest the but of a lance.

   Lance corporal, same as Lancepesade.

   Lance knight, a lansquenet. --B. Jonson.

   Lance snake (Zool.), the fer-de-lance.

   Stink-fire lance (Mil.), a kind of fuse filled with a
      composition which burns with a suffocating odor; -- used
      in the counter operations of miners.

   To break a lance, to engage in a tilt or contest.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Lance \Lance\, v. t. [imp. & p. p. Lanced; p. pr. & vb. n.
   Lancing.]
   1. To pierce with a lance, or with any similar weapon.
      [1913 Webster]

            Seized the due victim, and with fury lanced
            Her back.                             --Dryden.
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   2. To open with a lancet; to pierce; as, to lance a vein or
      an abscess.
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   3. To throw in the manner of a lance. See Lanch.
      [1913 Webster]

WordNet (r) 3.0 (2006):

lance
    n 1: a long pointed rod used as a tool or weapon [syn: spear,
         lance, shaft]
    2: an implement with a shaft and barbed point used for catching
       fish [syn: spear, gig, fizgig, fishgig, lance]
    3: a surgical knife with a pointed double-edged blade; used for
       punctures and small incisions [syn: lancet, lance]
    v 1: move quickly, as if by cutting one's way; "Planes lanced
         towards the shore"
    2: pierce with a lance, as in a knights' fight
    3: open by piercing with a lancet; "lance a boil"

The Free On-line Dictionary of Computing (19 January 2023):

LANCE

   Local Area Network Controller for Ethernet.

   The alternative name for the Am7990 integrated circuit used
   in a Filtabyte Ethernet controller card.

   (1995-02-15)