The Magnificat; Canticle of the Blessed Virgin Mary
Canticle beginning Magnificat anima mea Dominum (My soul doth magnify the Lord).
One of the three "evangelical canticles," it is included in the Roman Breviary for Vespers daily throughout the year and is often sung on solemn occasions.
It was recited by the Blessed Virgin on her visit to Elizabeth after the Angel Gabriel had announced that Mary was to become the mother of Christ (Luke 1).
In style it resembles the Canticle of Anna (1 Kings 1-10).
New Catholic Dictionary