aggression

noun

ag·​gres·​sion ə-ˈgre-shən 

1

: a forceful action or procedure (such as an unprovoked attack) especially when intended to dominate or master

2

: the practice of making attacks or encroachments

especially : unprovoked violation by one country of the territorial integrity of another

warned that any act of aggression could start a war

3

: hostile, injurious, or destructive behavior or outlook especially when caused by frustration

Aggression is often the expression of pent-up rage.

Synonyms of aggression

• aggressiveness
• hostility
• defiance
• belligerence

Examples of aggression in a Sentence

He has a lot of pent-up aggression.

behavior that is likely to provoke aggression

dangerous dogs showing aggression toward people

The government says that it will view any attempt to fly over its territory as an act of aggression.

Recent Examples on the Web

He is known for his physicality and aggression, and supporters have already seen plenty of that in his short time on Merseyside. — Anantaajith Raghuraman, New York Times, 9 Sep. 2026

Instead, that generation’s gesture seems to be stymied or to miss its target and end in bitterness—which is precisely what gives these artists’ work at its best a poignancy on the other side of its aggression and humor. — Barry Schwabsky, ARTnews.com, 8 Sep. 2026

Volatile, headstrong, and brimming with wild-eyed passive-aggression, the actor’s performance heightens the wall situation from a neighborly dispute to the stuff of a biblical trial. — David Ehrlich, IndieWire, 8 Sep. 2026

Both are intentionally crafted to evoke an emotion of high-energy, aggression and loud personality to draw in the attention of those looking for their next race. — Usa Today, USA Today, 7 Sep. 2026

Word History

Etymology

borrowed from French & Latin; French agression, going back to Middle French, "attack," borrowed from Latin aggressiōn-, aggressiō, from aggredī "to approach, attack" + -tiōn-, -tiō, suffix of action nouns — more at aggress

First Known Use

1611, in the meaning defined at sense 1

Phrases Containing aggression

• anti-aggression
• counter-aggression

Rhymes for aggression

• accession
• compression
• concession
• confession
• depression
• digression
• discretion
• expression
• impression
• obsession
• oppression
• possession

Kids Definition

aggression

noun

ag·​gres·​sion ə-ˈgresh-ən 

1

: an attack made without reasonable cause

2

: the practice of making attacks

3

: hostile or destructive behavior or outlook

Etymology

derived from Latin aggredi "to attack," from ad- "to" and gradi "to step, go"

Medical Definition

aggression

noun

ag·​gres·​sion ə-ˈgresh-ən 

: hostile, injurious, or destructive behavior or outlook