actio

noun

ac·​tio

ˈak-shē-ˌō,

ˈäk-tē-ˌō

plural actiones

ˌak-shē-ˈō-ˌnēz,

ˌäk-tē-ˈō-ˌnās

Roman law

: an action or right of action see formula sense 5

Word History

Etymology

Latin

First Known Use

1888, 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