n.1.The inferior, or after, part of the day; the afternoon.
In undermeals and in mornings.
- Chaucer.
2.Hence, something occurring or done in the afternoon; esp., an afternoon meal; supper; also, an afternoon nap; a siesta.
Another great supper, or undermeal, was made ready for them, coming home from ditching and plowing.
- Withals (1608).
I think I am furnished with Cattern [Catharine] pears for one undermeal.
- B. Jonson.
In a narrower limit than the forty years' undermeal of the seven sleepers.
- Nash.
Webster's Revised Unabridged Dictionary, published 1913 by G. & C. Merriam Co.