bittern bitterly • bitterness · · · Info · Definitions · Characters · · bittern · · Text Latin · · Script 7 · · Length Definitions · · · (noun) relatively small compact tawny-brown heron with nocturnal habits and a booming cry; found in marshes. · · Noun Definition 1 Characters · · b latin small letter b U+0062 e latin small letter e U+0065 i latin small letter i U+0069 n latin small letter n U+006E r latin small letter r U+0072 t latin small letter t U+0074