1. (n.) An ancient and celebrated Christian hymn, of uncertain authorship, but often ascribed to St. Ambrose; -- so called from the first words Te Deum laudamus. It forms part of the daily matins of the Roman Catholic breviary, and is sung on all occasions of thanksgiving. In its English form, commencing with words, We praise thee, O God, it forms a part of the regular morning service of the Church of England and the Protestant Episcopal Church in America.

2. (n.) A religious service in which the singing of the hymn forms a principal part.

Alleluia Anamnesis Benedicite Blessing Canon Collect Communion Consecration Credo Dismissal Epistle Fraction Gloria Gloria Patri Gloria in Excelsis Gospel Gradual Holy Grail Host Introit Kyrie Kyrie Eleison Last Gospel Lavabo Magnificat Miserere Nunc Dimittis Offertory Paternoster Pax Pieta Post-Communion Preface Sanctus Sanctus bell Sangraal Secreta Te Deum Tersanctus Tract Trisagion Vedic hymn alleluia answer anthem antiphon antiphony ark asperger asperges aspergillum bambino beadroll beads candle canticle censer chant chaplet chorale ciborium cross crucifix cruet doxology eucharistial hallelujah holy cross holy water holy-water sprinkler hosanna hymn hymn of praise hymnody hymnography hymnology icon incensory laud mantra matzo menorah mezuzah mikvah monstrance motet offertory offertory sentence osculatory ostensorium paean paschal candle pax phylacteries prayer shawl prayer wheel psalm psalmody pyx relics report response responsory rood rosary sacramental sacred relics sacring bell shofar sukkah tabernacle tallith thurible urceole veronica versicle vigil light votive candle