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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.

But by definition, most investors can’t be better than average.

From MarketWatch • Apr. 14, 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

Lombard strategist Dario Perkins points out that a haven currency and bond market by definition shouldn’t have behaved that way during a crisis.

From The Wall Street Journal • Jan. 28, 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

Well, by definition, i2 = –1—a point whose angle is 180 degrees from the x-axis; the angle has doubled.

From "Zero: The Biography of a Dangerous Idea" by Charles Seife