We found 4 dictionaries that define the word bread and butter letter:

General (3 matching dictionaries)

1. bread-and-butter letter: Oxford Learner's Dictionaries
2. bread-and-butter letter, bread-and-butter letter: Collins English Dictionary
3. bread-and-butter letter: Wiktionary

Miscellaneous (1 matching dictionary)

4. bread-and-butter letter: Idioms

▸ Words similar to bread and butter letter ▸ Usage examples for bread and butter letter ▸ Idioms related to bread and butter letter ▸ Wikipedia articles (New!) ▸ Words that often appear near bread and butter letter ▸ Rhymes of bread and butter letter ▸ Invented words related to bread and butter letter