We found 5 dictionaries that define the word on a first name basis:

General (4 matching dictionaries)

1. on a first-name basis: Merriam-Webster
2. on a first-name basis: Oxford Learner's Dictionaries
3. on a first-name basis: Cambridge Advanced Learner's Dictionary
4. on a first-name basis: Wiktionary

Miscellaneous (1 matching dictionary)

5. on a first-name basis: Idioms

▸ Words similar to on a first name basis ▸ Usage examples for on a first name basis ▸ Idioms related to on a first name basis ▸ Wikipedia articles (New!) ▸ Words that often appear near on a first name basis ▸ Rhymes of on a first name basis ▸ Invented words related to on a first name basis