Webster's Revised Unabridged Dictionary · 1913

Michaelmas

Michaelmas , noun

[Michael + mass religious service; Old English Mighelmesse.]

The feast of the archangel Michael, a church festival, celebrated on the 29th of September. Hence, colloquially, autumn.

Collocations (1)

Michaelmas daisy (Botany) , See under Daisy.