01 n. The science or art of exact reasoning, or of pure and formal thought, or of the laws according to which the processes of pure thinking shou…
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1.
The science or art of exact reasoning, or of pure and formal thought, or of the laws according to which the processes of pure thinking should be conducted; the science of the formation and application of general notions; the science of generalization, judgment, classification, reasoning, and systematic arrangement; the science of correct reasoning.“Logic is the science of the laws of thought, as thought; that is, of the necessary conditions to which thought, considered in itself, is subject.” — Sir W. Hamilton.
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2.
A treatise on logic; as, Mill's Logic.
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3.
correct reasoning; as, I can't see any logic in his argument; also, sound judgment; as, the logic of surrender was uncontestable.
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The path of reasoning used in any specific argument; as, his logic was irrefutable.
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5.
A function of an electrical circuit (called a gate) that mimics certain elementary binary logical operations on electrical signals, such as AND, OR, or NOT; as, a logic circuit; the arithmetic and logic unit.(Electronics, Computers)