Definition of spiring:
(n) :
(architecture) A tapering structure built on a roof or tower, especially as one of the central architectural features of a church or cathedral roof.
(n) :
The top, or uppermost point, of anything; the summit.
(n) :
A sharp or tapering point.
(n) :
A young shoot of a plant; a spear.
(n) :
Any of various tall grasses, rushes, or sedges, such as the marram, the reed canary-grass, etc.
(v) :
(of a seed, plant etc.) to sprout, to send forth the early shoots of growth; to germinate.