Definition of "undern" in English

noun

1. (obsolete) Synonym of terce: the third hour of daylight (about 9 am).

2. (obsolete) Synonym of noon: the sixth hour of daylight (12 pm).

3. (UK, dialectal) Synonym of afternoon.

4. (UK, dialectal) Synonym of evening.

5. (UK, dialectal) A light meal, particularly in the afternoon.