Concise Bible Dictionary:
1. aruchah, “allowance.” Any meal of herbs where there is love is better than a stalled ox with hatred (Prov. 15:17).
2. akal, “to eat.” Joseph’s brethren were “to eat” with him at noon (Gen. 43:16).
3. ἄριστον, a meal taken in the morning (compare John 21:4,12,15); but late enough for friends to be invited (Luke 11:37-38). Used for a marriage feast in Matthew 22:2,4, perhaps as late as noon: it is distinguished from “supper” in Luke 14:12.