louver louvar • louvered · · · Info · Definitions · Synonyms · Characters · · louver · · Text Latin · · Script 6 · · Length Definitions · · · (noun) one of a set of parallel slats in a door or window to admit air and reject rain. Synonyms: louvre, fin. · · Noun Definition 1 Synonyms · · · louvre · · Synonym 1 fin · · Synonym 2 Characters · · e latin small letter e U+0065 l latin small letter l U+006C o latin small letter o U+006F r latin small letter r U+0072 u latin small letter u U+0075 v latin small letter v U+0076