MAT'INS, noun Morning worship or service; morning prayers or songs. The vigils are celebrated before them, and the nocturne and matins for the saints whose the relics are. The winged choristers began To chirp their matins 1. Time of morning service; the first canonical hour in the Romish church.
Source: Webster's 1828 American Dictionary ↗ · public-domain · returned verbatim, no AI