drowsiness drowsily • drowsy · · · Info · Definitions · Synonyms · Characters · · drowsiness · · Text Latin · · Script 10 · · Length Definitions · · · (noun) a very sleepy state. Synonyms: sleepiness, somnolence. Example: "Sleepiness causes many driving accidents." · · Noun Definition 1 Synonyms · · · sleepiness · · Synonym 1 somnolence · · Synonym 2 Characters · · d latin small letter d U+0064 e latin small letter e U+0065 i latin small letter i U+0069 n latin small letter n U+006E o latin small letter o U+006F r latin small letter r U+0072 s latin small letter s U+0073 w latin small letter w U+0077