Vow \Vow\, v. t. [imp. & p. p. {Vowed}; p. pr. & vb. n. {Vowing}.] [OE. vouen, OF. vouer, voer, F. vouer, LL. votare. See {Vow}, n.] 1. To give, consecrate, or dedicate to God, or to some deity, by a solemn promise; to devote; to promise solemnly. ``When thou vowest a vow unto God, defer not to pay it.'' --Eccl. v. 4. [Men] that vow a long and weary pilgrimage. --Shak. 2. To assert solemnly; to asseverate.