Merriam-Webster Logo
  • Dictionary
  • Thesaurus
  • Scrabble
  • Spanish Central
  • Learner's Dictionary


verb ag·gress \ə-ˈgres\

Definition of aggress

  1. intransitive verb
  2. :  to commit aggression :  act aggressively

Did You Know?

Aggress and its more familiar relatives, "aggression" and "aggressive," derive from the Latin verb aggredi, meaning "to approach, attack, or undertake." When "aggress" was first used in English in the 16th century, it meant "to approach," but that use is now obsolete. The current meaning of the word has been with us since the early 18th century. Back then, the noun "aggress" ("an attack") appeared occasionally as well, but time has relegated that use to obsolescence, too.

Circa 1714

First Known Use of aggress

circa 1714

Seen and Heard

What made you want to look up aggress? Please tell us where you read or heard it (including the quote, if possible).


to expose to danger or risk

Get Word of the Day daily email!