Definition

The brightness or amount of light that comes from a surface or source.

Example

The luminance of the screen was adjusted to reduce glare.

Conversation

Did you notice the luminance of the sunset last night?

Yes! It was so bright and beautiful, I couldn't take my eyes off it.

I love how the luminance changes as the sun sets.

Me too! It always makes for a perfect photo opportunity.

Synonyms & Antonyms

Root Explanation

Luminance → It is formed from "lumen" (meaning light) and the suffix "-ance" (indicating a state or quality). The word "luminance" refers to the quality or state of being light or the amount of light emitted or reflected by a surface.

Memory Tip

Think of 'lumen' meaning light, and remember that 'luminance' describes the quality of light emitted or reflected.

Visually Confused Words