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aggressive

American  
[uh-gres-iv] / əˈgrɛs ɪv /

adjective

  1. characterized by or tending toward unprovoked offensives, attacks, invasions, or the like; militantly forward or menacing.

    aggressive acts against a neighboring country.

    Synonyms:
    militant, pugnacious
    Antonyms:
    friendly
  2. making an all-out effort to win or succeed; competitive.

    an aggressive basketball player.

    Synonyms:
    assertive, enterprising, forceful
    Antonyms:
    hesitant, timid, shy, retiring
  3. vigorously energetic, especially in the use of initiative and forcefulness.

    an aggressive salesperson.

  4. boldly assertive and forward; pushy.

    an aggressive driver.

  5. emphasizing maximum growth and capital gains over quality, security, and income.

    an aggressive mutual fund.

  6. Medicine/Medical.

    1. (of a disease or tumor) growing or spreading rapidly; highly invasive; difficult or impossible to treat successfully.

      aggressive brain lesions.

    2. pertaining to a risky surgery or treatment, or to a medication that has grave side effects.

      aggressive chemotherapy.

  7. (of a plant) spreading more rapidly than is desirable; tending to spread where not wanted.

    The joe-pye weed may be too aggressive to contain in the small area you’ve designated.


aggressive British  
/ əˈɡrɛsɪv /

adjective

  1. quarrelsome or belligerent

    an aggressive remark

  2. assertive; vigorous

    an aggressive business executive

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Other Word Forms

Etymology

Origin of aggressive

First recorded in 1690–1700; from Late Latin aggressīvus, derivative of Latin aggressus, past participle of aggredī “to go to, approach, attack”

Explanation

Someone or something aggressive shows a lot of energy and has a strong impact. After the aggressive salesman stopped them again on their way through the mall, the couple got aggressive and replied in a loud, made-up foreign language until he went away. Being aggressive often means being physical or showing force, but it is equally powerful as an adjective reflecting a forceful determination to get something done. An aggressive football player may tackle everyone in sight to get a win, while a driven student might tackle a project or problem head-on with aggressive determination to improve their grade. Aggressive comes from the Latin aggress-, "attack," and being aggressive shows an intention to attack bodily, mentally, or verbally whatever gets in the way.

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Vocabulary lists containing aggressive

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

My hair loss isn’t as severe as it is for folks with more aggressive alopecia, but it’s still tough to live with.

From Slate • May 23, 2026

“I’ve been buying over the past two, three years anyway and making some investments and putting out some new spec homes, but I think we’re going to start getting a little bit more aggressive now.”

From MarketWatch • May 22, 2026

A few weeks after Gatto took over vocals, they knocked out four songs, highlighted by the aggressive doom of “Time to Burn” and the blasting guitars that echo Gatto’s melodic angst on “Hot Pursuit.”

From Los Angeles Times • May 21, 2026

Yields on U.K. government bonds fell after below-forecast inflation for April calmed fears about the possibility of aggressive Bank of England interest-rate rises in the coming months.

From The Wall Street Journal • May 20, 2026

“It seems indeed a far cry from the aggressive vigor with which the early Friends challenged the evils of their time,” she said.

From "Votes for Women!" by Winifred Conkling

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