The Collaborative International Dictionary of English v.0.48:

Spire \Spire\, v. i. [imp. & p. p. Spired; p. pr. & vb. n.
   Spiring.]
   To shoot forth, or up in, or as if in, a spire. --Emerson.
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         It is not so apt to spire up as the other sorts, being
         more inclined to branch into arms.       --Mortimer.
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The Collaborative International Dictionary of English v.0.48:

Spire \Spire\, v. i. [L. spirare to breathe. See Spirit.]
   To breathe. [Obs.] --Shenstone.
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The Collaborative International Dictionary of English v.0.48:

Spire \Spire\, n. [L. spira coil, twist; akin to Gr. ???: cf. F.
   spire.]
   1. A spiral; a curl; a whorl; a twist. --Dryden.
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   2. (Geom.) The part of a spiral generated in one revolution
      of the straight line about the pole. See Spiral, n.
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   Spire bearer. (Paleon.) Same as Spirifer.
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The Collaborative International Dictionary of English v.0.48:

Spire \Spire\, n. [OE. spire, spir, a blade of grass, a young
   shoot, AS. sp[imac]r; akin to G. spier a blade of grass, Dan.
   spire a sprout, sprig, Sw. spira a spar, Icel. sp[imac]ra.]
   1. A slender stalk or blade in vegetation; as, a spire grass
      or of wheat.
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            An oak cometh up a little spire.      --Chaucer.
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   2. A tapering body that shoots up or out to a point in a
      conical or pyramidal form. Specifically (Arch.), the roof
      of a tower when of a pyramidal form and high in proportion
      to its width; also, the pyramidal or aspiring termination
      of a tower which can not be said to have a roof, such as
      that of Strasburg cathedral; the tapering part of a
      steeple, or the steeple itself. "With glistering spires
      and pinnacles adorned." --Milton.
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            A spire of land that stand apart,
            Cleft from the main.                  --Tennyson.
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            Tall spire from which the sound of cheerful bells
            Just undulates upon the listening ear. --Cowper.
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   3. (Mining) A tube or fuse for communicating fire to the
      chargen in blasting.
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   4. The top, or uppermost point, of anything; the summit.
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            The spire and top of praises.         --Shak.
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WordNet (r) 3.0 (2006):

spire
    n 1: a tall tower that forms the superstructure of a building
         (usually a church or temple) and that tapers to a point at
         the top [syn: steeple, spire]