Definition of May lily in English:

May lily

noun

  • 1Lily of the valley, Convallaria majalis (now rare).

  • 2A Eurasian woodland plant, Maianthemum bifolium (family Convallariaceae), related to and resembling lily of the valley.

Origin

Mid 16th century; earliest use found in William Turner (d. 1568), naturalist and religious controversialist.