deduce

verb

de·​duce di-ˈdüs How to pronounce deduce (audio)
dē-;
 chiefly British  -ˈdyüs
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.
specifically, philosophy : to infer (see infer sense 1) from a general principle
2
: to trace the course of
deduce their lineage
deducible adjective

Frequently Asked Questions

What is the difference between deduction and induction?

Deductive reasoning, or deduction, is making an inference based on widely accepted facts or premises. If a beverage is defined as "drinkable through a straw," one could use deduction to determine soup to be a beverage. Inductive reasoning, or induction, is making an inference based on an observation, often of a sample. You can induce that the soup is tasty if you observe all of your friends consuming it. Read more on the difference between deduction and induction

What is the difference between abduction and deduction?

Abductive reasoning, or abduction, is making a probable conclusion from what you know. If you see an abandoned bowl of hot soup on the table, you can use abduction to conclude the owner of the soup is likely returning soon. Deductive reasoning, or deduction, is making an inference based on widely accepted facts or premises. If a meal is described as "eaten with a fork" you may use deduction to determine that it is solid food, rather than, say, a bowl of soup.

What is the difference between deduction and adduction?

Adduction is "the action of drawing (something, such as a limb) toward or past the median axis of the body," and "the bringing together of similar parts." Deduction may be "an act of taking away," or "something that is subtracted." Both words may be traced in part to the Latin dūcere, meaning "to lead."

Choose the Right Synonym for 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

Examples of deduce in a Sentence

I can deduce from the simple observation of your behavior that you're trying to hide something from me.
Recent Examples on the Web The researchers unearthed 128 ceramic artifacts — jars, bowls, cups and cookware — and were able to deduce that 64 pots were in use at the time of fire. Katie Hunt, CNN, 20 Mar. 2024 Holmes may deduce the who, what, when, and where, but Watson gives us the why. Ew Staff Updated, EW.com, 6 Mar. 2024 The yellow group is usually the easiest to figure out, blue and green fall in the middle, and the purple group is typically the hardest one to deduce. Kris Holt, Forbes, 1 Mar. 2024 Ancestral Lifestyles By tracing changes in language backwards towards their sources, linguists have deduced many of the basic characteristics of the original Proto-Indo-European language, including some vocabulary, how words were formed and some idea of how they were pronounced. Kurt Kleiner, Discover Magazine, 16 Feb. 2024 Eighteen months after their disappearance, the Navy declared Earhart and Noonan legally dead and deduced that their plane had run out of fuel and crashed into the Pacific. USA TODAY, 29 Jan. 2024 But the season finale truly opened eyes — and its universe — when scrappy dirtbag Eleanor (Kristen Bell) deduced that the avuncular architect guide had hoodwinked them all and that the Good Place was actually...the Bad Place. Ew Staff, EW.com, 8 Jan. 2024 It may be deduced that Thompson’s frustrations signal a refusal to accept his new reality. Shayna Rubin, The Mercury News, 13 Feb. 2024 Dirk Coster and George de Hevesy, working in Copenhagen, deduced that the unknown element would probably show great resemblance to element No. 40, zirconium. Mark Fischetti, Scientific American, 1 Feb. 2024

These examples are programmatically compiled from various online sources to illustrate current usage of the word 'deduce.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.

Word History

Etymology

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

First Known Use

15th century, in the meaning defined at sense 1

Time Traveler
The first known use of deduce was in the 15th century

Dictionary Entries Near deduce

Cite this Entry

“Deduce.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/deduce. Accessed 28 Mar. 2024.

Kids Definition

deduce

verb
de·​duce di-ˈd(y)üs How to pronounce deduce (audio)
deduced; deducing
1
a
: to draw a conclusion about particular facts or examples by applying them to a general rule or principle
b
: to determine by reasoning from a general rule or principle
2
: to trace the course or origin of
deducible adjective

More from Merriam-Webster on deduce

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