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. It is not so apt to spire up as the other sorts, being more inclined to branch into arms. --Mortimer. Spiring \Spir"ing\, a. Shooting up in a spire or spires. ``The spiring grass.'' --Dryton.