Meaning

noun the branch of philosophy that analyzes inference

noun reasoned and reasonable judgment

noun the principles that guide reasoning within a given field or situation

originFrom 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”).

Etymology from Wiktionary, CC BY-SA 3.0