English Reference
noun

aggression

n.
US /əˈɡɹɛʃən/ UK /ɐɡɹˈɛʃən/ ag·gres·sion UK spelling aggression's, aggression's

  1. 01 B2 Upper Intermediate

    angry or threatening behavior that shows you are ready to fight or attack someone.

    hostile or destructive behavior or attitudes, especially when expressed through physical or verbal threats.

    Simple

    The dog showed aggression toward the mail carrier by growling and showing its teeth.

    In context

    Psychologists often distinguish between proactive aggression, which is calculated, and reactive aggression, which occurs as an impulsive response to a perceived threat.

    hostilitybelligerencepugnacity
  2. 02 C1 Advanced Formal Law

    an attack or invasion by one country against another without a good reason.

    the act of initiating hostilities or an unprovoked invasion of another nation's territory.

    Simple

    The international community condemned the unprovoked aggression against the smaller nation.

    In context

    The treaty was designed to protect member states from external aggression and to ensure collective security in the region.

  3. 03 B2 Upper Intermediate Sport

    a forceful way of doing something to make sure you succeed.

    forceful or assertive behavior intended to dominate a situation or achieve a competitive advantage.

    Simple

    The team played with great aggression and won the match in the final minutes.

    In context

    In high-stakes trading, a certain level of controlled aggression is often necessary to secure the best prices before the market shifts.

    assertivenessforcefulnessdrive
    passivitytimidity

Those shortages have already piqued concerns of a declining US ability to serve as deterrence against military aggression.

Al Jazeera· 15 Aug 2026

He added: “Finland is on the frontline of defending Europe against Putin’s aggression.

The Guardian· 17 Aug 2026

From Middle French aggression, from Latin aggressio, from aggressus, past participle of aggredior (“to approach, address, attack”).

Etymology adapted from Wiktionary, available under CC BY-SA 4.0.

This entry
Origin Latin aggressio
Level C1 · Advanced
Frequency Frequent
Updated