Longman Dictionary of Contemporary English homepage

Date: 1300-1400
Language: French
Origin: logique, from Latin logica, from Greek logike, from logos 'speech, word, reason'

logic

 noun
     
lo‧gic
1 [singular, uncountable] a way of thinking about something that seems correct and reasonable, or a set of sensible reasons for doing something
logic behind
The logic behind this statement is faulty.
logic of
What's the logic of your argument?
accept/follow/see somebody's logic
It's easy to understand his logic.
There is a certain logic in their choice of architect.
commercial/industrial/economic logic
Commercial logic has forced the two parts of the company closer together.
2 [uncountable] a formal method of reasoning, in which ideas are based on previous ideas
3TD [uncountable] technicalTD a set of choices that a computer uses to solve a problem
Definition from the Longman Dictionary of Contemporary English
Advanced Learner's Dictionary.

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