Undern

[Sarah]

The time between; the time between sunrise and noon;specifically, the third hour of the day, or nine o'clock in themorning, according to ancient reckoning; hence, mealtime, becauseformerly the principal meal was eaten at that hour; also, later, theafternoon; the time between dinner and supper. [Obs. or Prov. Eng.]Betwixt undern and noon was the field all won. R. of Brunne.In a bed of worts still he lay Till it was past undern of the day.Chaucer.