field army

noun

: a military unit organized to be capable of independent action and consisting conventionally of a headquarters, two or more corps, and auxiliary troops

Word History

First Known Use

1645, in the meaning defined above

The Ultimate Dictionary Awaits

Expand your vocabulary and dive deeper into language with Merriam-Webster Unabridged.

1. Expanded definitions
2. Detailed etymologies
3. Advanced search tools
4. All ad-free

Discover what makes Merriam-Webster Unabridged the essential choice for true word lovers.

Start Your Free Trial Now