brownout brownness • brownstone · · · Info · Definitions · Synonyms · Characters · · brownout · · Text Latin · · Script 8 · · Length Definitions · · · (noun) darkness resulting from the extinction of lights (as in a city invisible to enemy aircraft). Synonyms: blackout, dimout. · · Noun Definition 1 Synonyms · · · blackout · · Synonym 1 dimout · · Synonym 2 Characters · · b latin small letter b U+0062 n latin small letter n U+006E o latin small letter o U+006F r latin small letter r U+0072 t latin small letter t U+0074 u latin small letter u U+0075 w latin small letter w U+0077