Definition of simpler's joy in English:

simpler's joy

(also simplers joy)

noun

historical
  • The plant vervain, Verbena officinalis, highly valued in herbal medicine, or any of several other plants of the genus Verbena, especially the North American species V. hastata.

Origin

Mid 18th century; earliest use found in Philip Miller (1691–1771), horticulturist and writer.