logic.
Logical.
Meaning & usage
Logical.
Where this word comes from
From Middle English logike, from Old French and Latin logicus, from Ancient Greek λογῐκός (logĭkós). Displaced native Old English flitcræftlīċ.
A method of human thought that involves thinking in a linear, step-by-step manner about how a problem can be solved. Logic is the basis of many principles including the scientific method.
apply logic
understand logic
The study of the principles and criteria of valid inference and demonstration.
The mathematical study of relationships between rigorously defined concepts and of mathematical proof of statements.
A formal or informal language together with a deductive system or a model-theoretic semantics.
Any system of thought, whether rigorous and productive or not, especially one associated with a particular person.
It's hard to work out his system of logic.
The part of a system (usually electronic) that performs the boolean logic operations, short for logic gates or logic circuit.
Fred is designing the logic for the new controller.
A system of thought or collection of rhetoric, especially one associated with a social practice.
Where this word comes from
From Middle English logik, from Old French logike, from Latin logica, from Ancient Greek λογική (logikḗ, “logic”), from feminine of λογικός (logikós, “of or pertaining to speech or reason or reasoning, rational, reasonable”), from λόγος (lógos, “speech, reason”). Displaced native Old English flitcræft (literally “art of arguing”).
To engage in excessive or inappropriate application of logic.
To apply logical reasoning to.
To overcome by logical argument.
Where this word comes from
From Middle English logik, from Old French logike, from Latin logica, from Ancient Greek λογική (logikḗ, “logic”), from feminine of λογικός (logikós, “of or pertaining to speech or reason or reasoning, rational, reasonable”), from λόγος (lógos, “speech, reason”). Displaced native Old English flitcræft (literally “art of arguing”).
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Definitions, grammatical labels, IPA, etymology and examples: Wiktionary contributors, extracted by Kaikki / Wiktextract. Adapted under CC BY-SA 4.0. Selected fields and authored examples are shown; third-party quotations and audio are omitted. See contributor history.
Last enriched 2026-09-10. Definitions are in English. Romanizations are shown when supplied by the source; syllable estimates are omitted for unsupported scripts.