verb de·duce \ di-ˈdüs , dē- ; chiefly British -ˈdyüs \
Updated on: 28 Jan 2018

Definition of deduce

deduced; deducing
transitive verb
1 : to determine by reasoning or deduction
  • deduce the age of ancient artifacts
  • She deduced, from the fur stuck to his clothes, that he owned a cat.
; specificallyphilosophy : to infer (see infer 1) from a general principle
2 : to trace the course of
  • deduce their lineage


play \-ˈd(y)ü-sə-bəl\ adjective

Examples of deduce in a Sentence

  1. I can deduce from the simple observation of your behavior that you're trying to hide something from me.

Recent Examples of deduce from the Web

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'deduce.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

Origin and Etymology of deduce

Middle English, from Latin deducere, literally, to lead away, from de- + ducere to lead — more at 1tow

Synonym Discussion of deduce

infer, deduce, conclude, judge, gather mean to arrive at a mental conclusion. infer implies arriving at a conclusion by reasoning from evidence; if the evidence is slight, the term comes close to surmise.
    • from that remark, I inferred that they knew each other
deduce often adds to infer the special implication of drawing a particular inference from a generalization.
    • denied we could deduce anything important from human mortality
conclude implies arriving at a necessary inference at the end of a chain of reasoning.
    • concluded that only the accused could be guilty
judge stresses a weighing of the evidence on which a conclusion is based.
    • judge people by their actions
gather suggests an intuitive forming of a conclusion from implications.
    • gathered their desire to be alone without a word

DEDUCE Defined for English Language Learners



Definition of deduce for English Language Learners

  • : to use logic or reason to form (a conclusion or opinion about something) : to decide (something) after thinking about the known facts

DEDUCE Defined for Kids


verb de·duce \ di-ˈdüs , -ˈdyüs \

Definition of deduce for Students

deduced; deducing
: to figure out by using reason or logic
  • What can we deduce from the evidence?

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to blend or mix together

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