by definition

phrase

: because of what something or someone is : according to the definition of a word that is being used to describe someone or something
A volunteer by definition is not paid.
A glider is by definition an aircraft with no engine.

Examples of by definition in a Sentence

Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
For one thing, archetypes are by definition reductive, and there are plenty of people around here who are older, or parents, or retired, or indifferent to the bar scene, or all of the above. Christopher Bonanos, Curbed, 2 Sep. 2026 These children are, by definition, navigating an extraordinarily complicated system without a parent or guardian beside them. John Mattingly, Baltimore Sun, 1 Sep. 2026 Play, by definition, doesn’t produce anything tangible or useful. Louisa Thomas, New Yorker, 30 Aug. 2026 These are perfunctory roles by definition, so lackeys of one kind or another are often favored. Literary Hub, 28 Aug. 2026 See All Example Sentences for by definition

Browse Nearby Words

Cite this Entry

“By definition.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/by%20definition. Accessed 4 Sep. 2026.

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!

More from Merriam-Webster