semidarkness Get Printable Handwriting Watch Say It Video Hear It! Say It! Write It! Learn It! Spelling Test Definition noun. a state of partial darkness or dim light. Example Sentence He stumbled around in the semidarkness, trying to find his glasses. More Example Sentences In semidarkness the shadows danced around. Synonyms twilight; dimness; dusk Antonyms brightness; light; clarity Hear It! Say It! Write It! semidarkness Switch to cursive Start Share with your friends: Watch Say It Video