Webster's Revised Unabridged Dictionary · 1913

dinner

dinner , noun

[French dîner, from dîner to dine. See Dine.]

1.
The principal meal of the day, eaten in some countries about midday, but in others (especially in the U. S. and in large cities) at a later hour.
2.
An entertainment; a feast.
A grand political dinner. — Tennyson

Dinner is much used, in an obvious sense, either adjectively or as the first part of a compound; as, dinner time, or dinner-time, dinner bell, dinner hour, etc.