What is the meaning of Psalter?

Synonym of Psalms, particularly when printed as a separate work from the Bible.

Synonym of breviary, which arranges the Psalms for devotional recitation.

Synonym of Book of Common Prayer, which prominently includes the Psalms.

A rosary with 150 beads, used for reciting the Psalms in Catholic editions of the Bible.

Alternative form of psaltery, a kind of zither as well as the King James translation of certain obscure musical terms in the Old Testament.

Source: wiktionary.org