Noah Webster's New International Dictionary of the English Language
1. (n.) A sacred song; a poetical composition for use in the praise or worship of God.
2. (n.) Especially, one of the hymns by David and others, collected into one book of the Old Testament, or a modern metrical version of such a hymn for public worship.
3. (v. t.) To extol in psalms; to sing; as, psalming his praises.