Definition of logic in English:


Line breaks: logic
Pronunciation: /ˈlɒdʒɪk


[mass noun]
  • 1Reasoning conducted or assessed according to strict principles of validity: experience is a better guide to this than deductive logic the logic of the argument is faulty
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    • That is the primary reason and logic behind media.
    • And to take such a stance, outside of the accepted discourse of reason, means that he can't use deductive logic to defend it.
    • Whoever wishes to hold on to the distinction would need to maintain, according to his own logic, that he has always been there - a thesis which can all too easily be disproved.
    science of reasoning, science of deduction, science of thought, dialectics, argumentation, ratiocination
  • 1.1A particular system or codification of the principles of proof and inference: Aristotelian logic
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    • Frege's primary concern was to construct a system of logic, formulated in an idealized language, which was adequate for mathematical reasoning.
    • There is one context in which the language of possible worlds is undoubtedly useful and even illuminating, namely, in the study of formal axiomatic systems of modal logic.
    • Given that we are quoting Godel, I assumed that we were sticking to standard binary logic systems.
  • 1.2The systematic use of symbolic and mathematical techniques to determine the forms of valid deductive argument.
    More example sentences
    • In formal mathematical logic, one makes frequent use of the existential and universal quantifiers.
    • That fall, the process of smoothing out and filling in the technical details of Wiles's celebrated result turned up a troublesome gap in the proof's logic.
  • 1.3The quality of being justifiable by reason: there seemed to be a lack of logic in his remarks
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    • Reason, logic, and common sense are practically a foreign language to this girl!
    • With opinions and arguments completely lacking in evidence, logic or relevance, this stuff is irresistible.
    • There is a lack of logic in certain passages which reveals a sense of scepticism towards determination.
    reason, judgement, logical thought, rationality, cognition, wisdom, sagacity, sound judgement, sense, good sense, common sense, rationale, sanity; deduction, inference, syllogistic reasoning; coherence, relevance
    informal horse sense
  • 1.4 (the logic of) The course of action suggested by or following as a necessary consequence of: the logic of private competition was to replace small firms by larger firms
    More example sentences
    • Following the logic of postmodern criticism, we could assume a level of ironic distance.
    • The truly religious, following the logic of submission to political and moral ideals, and to the arbitrary will of God, are terrifying to us and almost incomprehensible.
    • We no longer follow the logic of one size fits all, like earlier.
    reasoning, line of reasoning, chain of reasoning, process of reasoning, argument, argumentation
  • 2A system or set of principles underlying the arrangements of elements in a computer or electronic device so as to perform a specified task.
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    • The computer program code logic is executed by the processing circuitry and is configured to generate an output signal.
    • Mac hardware today differs from PCs solely in the CPU, system logic and the motherboard they sit on.
    • Knowing algorithms, which is really the underlying piece of any logic in a computer program, is an extremely important skill for programmers.
  • 2.1Logical operations collectively.
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    • In such a PDA, DRAM cells normally are refreshed periodically by the memory controller logic present inside the CPU.
    • Another capability is that the software uses logic based on available memory to break up large models.
    • If performance parity is achieved, then moving to new core logic and memory is a non-issue, and it's easy to justify adopting those other neat new features.



Pronunciation: /ləˈdʒɪʃ(ə)n/
More example sentences
  • For centuries, theologians, logicians and philosophers have puzzled over the meaning of the name Destiny's Child.
  • Thus various detailed investigations by philosophers and logicians of such topics as explanation, confirmation, probability, and so on, may be reasonably taken to provide some of the ingredients for a general account of coherence.
  • Philosophers and logicians distinguish three types of reasoning which are useful for solving different kinds of problems: deductive, inductive, and dialectical reasoning.


late Middle English: via Old French logique and late Latin logica from Greek logikē (tekhnē) '(art) of reason', from logos 'word, reason'.

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