We found one dictionary that defines the word not a one:

General (1 matching dictionary)

1. not a one: Wiktionary

Phrases: not for a one minute, not for a one moment, more... ▸ Words similar to not a one ▸ Usage examples for not a one ▸ Idioms related to not a one ▸ Wikipedia articles (New!) ▸ Words that often appear near not a one ▸ Rhymes of not a one ▸ Invented words related to not a one