Dictionary.com
Thesaurus.com
Synonyms

powerful

American  
[pou-er-fuhl] / ˈpaʊ ər fəl /

adjective

  1. having or exerting great power or force.

    Synonyms:
    strong, forceful
    Antonyms:
    weak
  2. physically strong, as a person.

    a large, powerful athlete.

  3. producing great physical effects, as a machine or a blow.

  4. potent; efficacious.

    a powerful drug.

  5. having great effectiveness, as a speech, speaker, description, reason, etc.

    Synonyms:
    effective, cogent, forcible, convincing, influential
  6. having great power, authority, or influence; mighty.

    a powerful nation.

  7. Chiefly South Midland and Southern U.S. great in number or amount.

    a powerful lot of money.


powerful British  
/ ˈpaʊəfʊl /

adjective

  1. having great power, force, potency, or effect

  2. extremely effective or efficient in action

    a powerful drug

    a powerful lens

  3. dialect large or great

    a powerful amount of trouble

"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

adverb

  1. dialect extremely; very

    he ran powerful fast

"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

Related Words

Powerful, mighty, potent suggest great force or strength. Powerful suggests capability of exerting great force or overcoming strong resistance: a powerful machine like a bulldozer. Mighty, now chiefly rhetorical, implies uncommon or overwhelming strength of power: a mighty army. Potent implies great natural or inherent power: a potent influence.

Other Word Forms

  • overpowerful adjective
  • overpowerfully adverb
  • overpowerfulness noun
  • powerfully adverb
  • powerfulness noun
  • quasi-powerful adjective
  • quasi-powerfully adverb
  • superpowerful adjective
  • ultrapowerful adjective
  • unpowerful adjective

Etymology

Origin of powerful

First recorded in 1350–1400, powerful is from the Middle English word powarfull. See power, -ful

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.

An industrial relations showdown looms this week as Germany's powerful IG Metall union is seeking to gain control of the works council at US billionaire Elon Musk's Tesla plant outside Berlin.

From Barron's

Ali Larijani, the powerful head of the Supreme National Security Council, voiced defiance, vowing that Iran would defend itself whatever the cost.

From Barron's

He has investigated the agendas of powerful fossil fuel billionaires, delved into epic feuds pitting some of the world's largest energy companies against each other, and revealed how drillers navigate a treacherous political landscape.

From The Wall Street Journal

MUNICH—When the full-scale Russian invasion began, Western defense manufacturers rushed their modern weaponry into Ukraine, helping Kyiv drive back a much more powerful foe.

From The Wall Street Journal

"This year, we see so many incredible films being treated the same as American films -- powerful and different films, representing various ideas in the world."

From Barron's