Meaning

adjective marked by strict and particular and complete accordance with fact

adjective (of ideas, images, representations, expressions) characterized by perfect conformity to fact or truth ; strictly correct

originEtymology tree English exact Proto-Indo-European *-yósder. Proto-Italic *-āzijos Latin -āriusnom. Latin -āriusbor. Proto-Germanic *-ārijaz Proto-West Germanic *-ārī Old English -ere Middle English -ere English -er English exacter From exact + -er.

Etymology from Wiktionary, CC BY-SA 3.0