Webster Dictionary(0.00 / 0 votes)Rate this definition: 1  Illumination(noun) the act of illuminating, or supplying with light; the state of being illuminated. 2  Illumination(noun) festive decoration of houses or buildings with lights. 3  Illumination(noun) adornment of books and manuscripts with colored illustrations.
Harley Quinn Already Getting A Spinoff Movie, With An Important Twist. Harley Quinn has been a staple in DC Comics staple since she was introduced in Batman: The Animated Series, and this August, sheâs finally making her theatrical debut in Suicide Squad, played by Margot Robbie.
She later appeared in DC Comics' Batman comic books, with the character's first comic book appearance in The Batman Adventures #12 (September 1993). Harley Quinn is the Joker's frequent accomplice and lover, whom she met while working as a psychologist at Gotham City's Arkham Asylum, where the Joker was a patient.