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Definitions

by definition

ADVERB
necessarily
Synonyms
STRONGEST
automatically naturally no doubt undoubtedly unquestionably
WEAK
accordingly as a matter of course axiomatically beyond one's control by its own nature cardinally come what may compulsorily consequently exigently from within fundamentally incontrovertibly indubitably ineluctably inescapably inexorably irresistibly of course of necessity perforce positively pressingly significantly unpreventably vitally willy-nilly without fail
Antonyms
STRONGEST
doubtfully questionably
WEAK
unnecessarily
ADVERB
per se
Synonyms
WEAK
alone as such by and of itself by its very nature by itself fundamentally in essence in itself independently intrinsically of itself singularly solely virtually

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.

“Panic by definition is irrational. Markets don’t know how to price it.”

From The Wall Street Journal • Mar. 27, 2026

"He seems to believe that any good-faith disagreement with his own interpretation of the law is, by definition, illegitimate," Schwinn told AFP.

From Barron's • Feb. 20, 2026

First, scientists, by definition, don’t believe anything until it’s proven, and these things are often almost impossible to prove in the real world.

From MarketWatch • Feb. 11, 2026

Which brings us to the fundamental problem with “squirrel-proof” feeders: Every supposedly clever mechanism is, by definition, a puzzle.

From Slate • Jan. 25, 2026

Indeed, because all facts are by definition true we tend to think all truths are facts.

From "The Invention of Science" by David Wootton

From Roget's 21st Century Thesaurus, Third Edition Copyright © 2013 by the Philip Lief Group.