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.
Cite this Entry
“By definition.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/by%20definition. Accessed 11 Mar. 2026.
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