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Synonyms

doer

American  
[doo-er] / ˈdu ər /

noun

  1. a person or thing that does something, especially a person who gets things done 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

He said he and his wife Victoria chose it as a "doer upper".

From BBC • Oct. 8, 2024

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

The passive allows a writer to postpone the mention of a doer that is heavy, old news, or both.

From "The Sense of Style" by Steven Pinker

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.