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Definitions

deductive

[dih-duhk-tiv] / dɪˈdʌk tɪv /
ADJECTIVE
deducible
Synonyms
WEAK
a priori consequent derivable dogmatic following inferable inferential provable reasoned traceable
ADJECTIVE
determinable
Synonyms
WEAK
ascertainable assayable discoverable judicable measurable provable
ADJECTIVE
dogmatic
Synonyms
STRONGEST
assertive categorical pragmatic reasoned
WEAK
a priori as a matter of course authoritarian authoritative axiomatic by fiat by natural law by nature canonical deducible derivable doctrinaire doctrinal eternal excathedra formal imperative inevitable on faith oracular orthodox peremptory positive prophetic systematic theoretical unchangeable unerring unqualified
Antonyms
WEAK
ambiguous amenable doubtful doubting dubious equivocal flexible fluctuating indecisive manageable not positive obedient questioning skeptical submissive uncertain vacillating
ADJECTIVE
rational
Synonyms
STRONGEST
analytical balanced deliberate enlightened impartial intelligent judicious levelheaded logical lucid normal prudent reasonable sane sensible sober stable thoughtful wise
STRONG
calm cool intellectual knowing objective reasoning sound synthetic thinking
WEAK
all there cerebral circumspect cognitive collected discerning discriminating far-sighted perspicacious philosophic ratiocinative reflective sagacious together well-advised
Antonyms
STRONGEST
careless confused foolish idiotic illogical insane irrational nonsensical senseless stupid thoughtless unbalanced unintelligent unreasonable unstable unsystematic unwise
STRONG
agitated excited
WEAK
ridiculous unrealistic unsound
ADJECTIVE
scientific
Synonyms
STRONGEST
experimental mathematical objective
WEAK
accurate clear controlled exact logical methodical precise sound
Antonyms
WEAK
artistic
ADVERB
a priori
Synonyms
WEAK
based on theory deduced derivable inferred presumptive rational reasoned supposed theoretical

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.

Then again, those New Year’s Eve revelers may have had their powers of basic detection and deductive reasoning sharpened by being led astray by AI slop.

From Salon • Jan. 21, 2026

Not through any kind of intuition or deductive superpower, mind you.

From Los Angeles Times • Jan. 9, 2025

A mathematician might point to a deductive argument, a scientist to experiments, and a lawyer to courtroom evidence and testimony.

From Scientific American • Jul. 1, 2023

Holcomb, as we’ve seen, can’t figure out how Brooks’s grift operated, so he turns to Perry, whose deductive mind he recognizes as superior to his own, for help.

From New York Times • Apr. 10, 2023

It is a supremely deductive brain, but it resembles an idiot savante.

From "I, Robot" by Isaac Asimov

Vocabulary lists containing deductive

The AP English Exam: Rhetorical and Literary Terms 1

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Divergent

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Writing - High School

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