We found 2 dictionaries that define the word a rule of thumb:

General (1 matching dictionary)

1. A Rule Of Thumb: A to Z list of the most popular idioms

Miscellaneous (1 matching dictionary)

2. a rule of thumb: Idioms

Phrases: as a rule of thumb, more... ▸ Words similar to a rule of thumb ▸ Usage examples for a rule of thumb ▸ Idioms related to a rule of thumb ▸ Wikipedia articles (New!) ▸ Words that often appear near a rule of thumb ▸ Rhymes of a rule of thumb ▸ Invented words related to a rule of thumb