A solemn promise made to God, or to some deity; an act by which one consecrates or devotes himself, absolutely or conditionally, wholly or in part, for a longer or shorter time, to some act, service, or condition; a devotion of one's possessions; as, a baptismal vow; a vow of poverty. "Nothing... that may... stain my vow of Nazarite." "I pray thee, let me go and pay my vow." "I am combined by a sacred vow."