logic

noun log·ic \ˈlä-jik\

: 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

Full Definition of LOGIC

a (1) : a science that deals with the principles and criteria of validity of inference and demonstration : the science of the formal principles of reasoning (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

b (1) : a particular mode of reasoning viewed as valid or faulty (2) : relevance, propriety

c : interrelation or sequence of facts or events when seen as inevitable or predictable

d : the arrangement of circuit elements (as in a computer) needed for computation; also : the circuits themselves

: something that forces a decision apart from or in opposition to reason <the logic of war>

— lo·gi·cian \lō-ˈji-shən\ noun

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Origin of 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

First Known Use: 12th century