Definitions
1.nounThe first meal of the day, usually eaten in the morning."You should put more protein in her breakfast so she will grow."
2.noun(by extension) A meal consisting of food normally eaten in the morning, which may typically include eggs, sausages, toast, bacon, etc."We serve breakfast all day."
3.nounThe celebratory meal served after a wedding (and occasionally after other solemnities e.g. a funeral).
4.noun(largely obsolete outside religion) A meal eaten after a period of (now often religious) fasting.
5.verbTo eat the morning meal.
6.verbTo serve breakfast to.