—n. 1. a tall, acutely pointed pyramidal roof or rooflike construction upon a tower, roof, etc.
2. a similar construction forming the upper part of a steeple. See illus. under steeple. 3. a tapering, pointed part of something; a tall, sharp-pointed summit, peak, or the like: the distant spires of the mountains. 4. the highest point or summit of something: the spire of a hill; the spire of one's profession. 5. a sprout or shoot of a plant, as an acrospire of grain or a blade or spear of grass.
—v.i. to shoot or rise into spirelike form; rise or extend to a height in the manner of a spire.
Pronunciation: (spīur),[key] —n. 1. a coil or spiral.
2. one of the series of convolutions of a coil or spiral.
3. Zool.the upper, convoluted part of a spiral shell, above the aperture.