Archaic1. All Saints' Day. 2. The feast observed on All Saints' Day.
ETYMOLOGY:
Middle English Alhalwemesse, from Old English ealra hlgena mæsse : ealra, genitive pl. of eall, all; see all + hlgena, genitive pl. of hlga, saint (from hlig, holy; see holy) + mæsse, Mass; see Mass.