breakfast

UK: /ˈbrɛkfəst/ US: /ˈbrɛkfəst/ ,(brek′fəst)

WordReference Random House Learner's Dictionary of American English © 2025

break•fast /ˈbrɛkfəst/   n. 

1. the first meal of the day;
   morning meal:
   [uncountable] What did you have for breakfast?
   [countable] He had a big breakfast that day.

v. 

2. to eat breakfast: [no object; (~ + on + object)]
   They breakfasted and left early.
   They breakfasted on fish and tea.

WordReference Random House Unabridged Dictionary of American English © 2025

break•fast  (brek′fəst), n. 

1. the first meal of the day;
   morning meal:
   A hearty breakfast was served at 7
   a.m.
2. the food eaten at the first meal of the day:
   a breakfast of bacon and eggs.

v.i. 

3. to eat breakfast:
   He breakfasted on bacon and eggs.

v.t. 

4. to supply with breakfast:
   We breakfasted the author in the finest restaurant.

• late Middle English brekfast. See break, fast² 1425–75

break′fast•er, n. 
break′fast•less, adj. 

Collins Concise English Dictionary © HarperCollins Publishers::

breakfast / ˈbrɛkfəst/ noun

1. the first meal of the day
2. the food at this meal

verb

1. to eat or supply with breakfast

Etymology: 15th Century: from break + fast²

ˈbreakfaster noun