Illuminate/ɪˈluːmɪneɪt/ Definition 1 of 5Pro Tip 1/3Literal Brightness Used when talking about actual light shining on objects. Can you illuminate the sign so we can read it? Pro Tip 2/3Visibility Increase To make something visible or prominent with light. We used spotlights to illuminate the artwork. Pro Tip 3/3Seeking Attention Highlighting an area to draw attention or interest. The guide used a torch to illuminate the cave paintings.