Real Dictionary

spire
countable noun: The spire of a building such as a church is the tall pointed structure on the top.

spire in American English 1
a spiral or coil
intransitive verb: to shoot or rise into spirelike form; rise or extend to a height in the manner of a spire
noun: a tall, acutely pointed pyramidal roof or rooflike construction upon a tower, roof, etc.

spire in American English 2
a sprout, spike, or stalk of a plant, a blade of grass, etc.
to extend upward, tapering to a point; shoot up or rise in, or put forth, a spire or spires
noun: a coil or spiral

spire in British English 1
noun: a tall structure that tapers upwards to a point, esp one on a tower or roof or one that forms the upper part of a steeple
verb: to assume the shape of a spire; point up

spire in British English 2
noun: any of the coils or turns in a spiral structure