logic

noun
log·​ic | \ ˈlä-jik How to pronounce logic (audio) \

Definition of logic

1a(1) : a science that deals with the principles and criteria of validity of inference and demonstration : the science of the formal principles of reasoning a professor of logic
(2) : a branch or variety of logic modal logic Boolean logic
(3) : a branch of semiotics especially : syntactics
(4) : the formal principles of a branch of knowledge the logic of grammar
b(1) : a particular mode of reasoning viewed as valid or faulty She spent a long time explaining the situation, but he failed to see her logic.
(2) : relevance, propriety could not understand the logic of such an action
c : interrelation or sequence of facts or events when seen as inevitable or predictable By the logic of events, anarchy leads to dictatorship.
d : the arrangement of circuit elements (as in a computer) needed for computation also : the circuits themselves
2 : something that forces a decision apart from or in opposition to reason the logic of war

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Other Words from logic

logician \ lō-​ˈji-​shən How to pronounce logician (audio) \ noun

How are logistics and logic related?

Logistics follows the same pattern of other plural nouns—such as ballistics, linguistics, statistics, or physics—that represent fields of study and take either a singular or plural verb.

Logic, used strictly in the singular, is a science that deals with the formal principles of reason. If a visitor walks in the house with wet hair, it is logical for one to assume that it is raining outside. Logistics, which involves such concerns as the delivery of personnel or supplies in an efficient manner, can often employ logic, such as by reasoning out the path least likely to interrupt the flow of a delivery:

As with many other areas of the economy, the digital revolution is having a profound effect on delivery logistics. The combination of mobile computing, analytics, and cloud services, all of which are fueled by the Internet of Things (IoT), is changing how delivery and fulfillment companies are conducting their operations.
—Andrew Meola, Business Insider, 14 Oct. 2016

Both logic and logistics ultimately derive from the Greek logos, meaning "reason." But while logic derives directly from Greek, logistics took a longer route, first passing into French as logistique, meaning "art of calculating," and then into English from there.

Examples of logic in a Sentence

If you just use a little logic, you'll see I'm right. There's no logic in your reasoning. There's some logic to what he says. There's a certain logic in what he says. The revolution proceeded according to its own logic. the logic of the situation
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Recent Examples on the Web

The same logic applies to toys, video games, clothes, etc. Michelle Singletary, Washington Post, "Should you give your kid an allowance? Not if you aren’t willing to do some work.," 13 June 2019 But the same logic isn't applied to the free-agency clock. Jr Radcliffe, Milwaukee Journal Sentinel, "Keston Hiura and what you need to know about the service-time clock and Super-2 status (they're not the same thing)," 4 June 2019 Hawkins thinks the same logic can apply to anything with a structured framework. Quanta Magazine, "The Brain Maps Out Ideas and Memories Like Spaces," 14 Jan. 2019 But the jackpots also reset, albeit infrequently, when a terminal's logic board fails, or an old video terminal is replaced. Ted Sickinger, OregonLive.com, "Oregon Lottery jackpots drop after reset: 'This wasn't an upgrade. It was a holdup.'," 28 Apr. 2018 Daisy is able to take apart the iPhone and gather the phone's main logic board, speaker, and rear camera and other parts that contain high-quality materials, important at a time when some of these components are made using rare-earth elements. Chris Ciaccia, Fox News, "In time for Earth Day, Apple unveils 'Daisy,' its second iPhone-disassembling robot," 20 Apr. 2018 The president and his team are operating on the simple logic that tariffs on imported cars and car parts would punish foreign makers, to the benefit of those brands that call America home. Alexander Stoklosa, Car and Driver, "President Trump Appears to Kick the 25 Percent Auto Tariff Can down the Road," 15 May 2019 Nouvel designed a museum that behaves like music, with an underlying logic but a persistent sense of expectation. Julie Lasky, ELLE Decor, "ED First Look: The National Museum of Qatar," 26 Mar. 2019 But if Kim does disarm, then Congress may see less logic in spending $6 billion or more to expand a missile defense system based in Alaska that is designed mainly with North Korea in mind. Robert Burns, Anchorage Daily News, "If North Korea disarms, will U.S. missile defense lose favor?," 26 June 2018

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

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First Known Use of logic

12th century, in the meaning defined at sense 1a(1)

History and Etymology for logic

Middle English logik, from Anglo-French, from Latin logica, from Greek logikē, from feminine of logikos of reason, from logos reason — more at legend

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Statistics for logic

Last Updated

21 Jun 2019

Look-up Popularity

Time Traveler for logic

The first known use of logic was in the 12th century

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More Definitions for logic

logic

noun

English Language Learners Definition of logic

: a proper or reasonable way of thinking about or understanding something
: a particular way of thinking about something
: the science that studies the formal processes used in thinking and reasoning

logic

noun
log·​ic | \ ˈlä-jik How to pronounce logic (audio) \

Kids Definition of logic

1 : a proper or reasonable way of thinking about something : sound reasoning There's no logic in what you said.
2 : a science that deals with the rules and processes used in sound thinking and reasoning

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More from Merriam-Webster on logic

Thesaurus: All synonyms and antonyms for logic

Spanish Central: Translation of logic

Nglish: Translation of logic for Spanish Speakers

Britannica English: Translation of logic for Arabic Speakers

Britannica.com: Encyclopedia article about logic

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