We found 3 dictionaries that define the word the odd one out:

General (2 matching dictionaries)

1. the odd one out: Merriam-Webster
2. the odd one out: Cambridge Advanced Learner's Dictionary

Miscellaneous (1 matching dictionary)

3. the odd one out: Idioms

▸ Words similar to the odd one out ▸ Usage examples for the odd one out ▸ Idioms related to the odd one out ▸ Wikipedia articles (New!) ▸ Words that often appear near the odd one out ▸ Rhymes of the odd one out ▸ Invented words related to the odd one out