This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

• Lexulous
• Wordscraper
• Wordosaur

n. A melody or song, particularly ecclesiastical.

n. The principal voice.

n. A song or melody; especially, an ecclesiastical melody or style of music.

n. Plain-song in particular.

n. A musical rendering of a liturgy, as contrasted with mere reading.

"The highest category of what he termed the cantus song or composition was the Mass, immediately followed by compositions on other sacred texts, these including the psalm, the Magnificat and the hymn; these genres were separate from the Mass, but were still part of the liturgy."

cantus planus    cantus ecclesiasticus    cantus figuratus    cantus ambrosianus    cantus mensurabilis    cantus firmus    cantus gregorianus   

baryton    entr'acte    soprani    at    prima donna