We found 3 dictionaries that define the word mule drivers:

General (3 matching dictionaries)

1. mule drivers: Collins English Dictionary
2. mule drivers: Vocabulary.com
3. mule-drivers: Wordnik

(Note: See mule_driver as well.)

Definitions from WordNet (mule driver) ▸ noun:  a worker who drives mules ▸ Also see mule_driver ▸ Words similar to mule drivers ▸ Usage examples for mule drivers ▸ Idioms related to mule drivers ▸ Wikipedia articles (New!) ▸ Words that often appear near mule drivers ▸ Rhymes of mule drivers ▸ Invented words related to mule drivers