Webster's Revised Unabridged Dictionary · 1913

Breakfast

Breakfast ({not transcribed}) , noun

[Break + fast.]

1.
The first meal in the day, or that which is eaten at the first meal.
A sorry breakfast for my lord protector. — Shakespeare
2.
A meal after fasting, or food in general.
The wolves will get a breakfast by my death. — Dryden

Breakfast , intransitive verb

To break one's fast in the morning; too eat the first meal in the day.
First, sir, I read, and then I breakfast. — Prior

Breakfast , transitive verb

To furnish with breakfast. — Milton