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doer

American  
[doo-er] / ˈdu ər /

noun

  1. a person or thing that does doe does do something, especially a person who gets things done done do with vigor and efficiency.

  2. a person characterized by action, as distinguished from one given to contemplation.

  3. Australian. an amusing or eccentric person; character.

doer British  
/ ˈduːə /

noun

  1. a person or thing that does something or acts in a specified manner

    a doer of good

  2. an active or energetic person

  3. a thriving animal, esp a horse

"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

Etymology

Origin of doer

1300–50; Middle English. See do 1, -er 1

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.

In one, Grimes offered to help Musk get $5 billion in funding from then-cryptocurrency wunderkind Sam Bankman-Fried, whom he described as an “Ultra genius and doer builder like your formula.”

From The Wall Street Journal • Feb. 10, 2026

And Cooper is not a politician who seeks attention, content to be seen as a "quiet doer", as a source describes her.

From BBC • Feb. 1, 2025

It’s like, hey buddy, turns out you are the doer.

From Slate • Jun. 28, 2023

Smart said the Ridley-Thomas he knows is “honorable, respectful, and a doer for the people — all people.”

From Los Angeles Times • Mar. 30, 2023

‘Many a doer of great deeds might say no more,’ said Ingold.

From "The Return of the King" by J.R.R. Tolkien

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.