[ loj-ik ]
/ ˈlɒdʒ ɪk /


the science that investigates the principles governing correct or reliable inference.
a particular method of reasoning or argumentation: We were unable to follow his logic.
the system or principles of reasoning applicable to any branch of knowledge or study.
reason or sound judgment, as in utterances or actions: There wasn't much logic in her move.
convincing forcefulness; inexorable truth or persuasiveness: the irresistible logic of the facts.
Computers. logic circuit.

Origin of logic

1325–75; Middle English logik < Latin logica, noun use of neuter plural (in ML taken as feminine singular) of Greek logikós of speech or reason. See logo-, -ic


log·ic·less, adjective non·log·ic, noun

Definition for logic (2 of 2)


a combining form used in the formation of adjectives corresponding to nouns ending in -logy: analogic.

Origin of -logic

< Greek -logikós. See logic

Example sentences from the Web for logic

British Dictionary definitions for logic

/ (ˈlɒdʒɪk) /


Word Origin for logic

C14: from Old French logique from Medieval Latin logica (neuter plural, treated in Medieval Latin as feminine singular), from Greek logikos concerning speech or reasoning

Scientific definitions for logic

[ lŏjĭk ]

The study of the principles of reasoning, especially of the structure of propositions as distinguished from their content and of method and validity in deductive reasoning.

Cultural definitions for logic


The branch of philosophy dealing with the principles of reasoning. Classical logic, as taught in ancient Greece and Rome, systematized rules for deduction. The modern scientific and philosophical logic of deduction has become closely allied to mathematics, especially in showing how the foundations of mathematics lie in logic.