A short piece of music set to Latin (and only Latin) words, and sung instead of, or immediately after, the Offertorium, or as a detached piece in extra-liturgical functions. The origin of the name is a matter of debate. The most generally accepted derivation is from the Latin motus, "movement"; but the French mot, "word", or "phrase" (old usage), has also been suggested. Unlike an Anthem, which uses the vernacular (such as Tavener's The Lamb).

Various motets include both Mozart's and William Byrd's Ave Verum Corpus, and many were written by others such as Samuel Wesley, Palestrina and Lully.