adj. [ p. p. of illuminate. ] 1. rendered luminous by rays of light striking and reflecting; -- used especially of illumination by artificial light. Syn. -- lighted. [ PJC ]
2. Adorned with pictorial or graphical designs, as a book or page with borders, initial letters, or miniature pictures in colors and gold, as was done in manuscripts of the Middle Ages; as, an illuminated manuscript. [ 1913 Webster ]
(adj) without illumination, Syn. unlit, unlighted, unilluminated, Example:came up the lightless stairs; the unilluminated side of Mars; through dark unlighted (or unlit) streets