- the quality or degree of clarity or translucence:Suspended solids are an essential variable in assessing the lucency of the water, a key issue in the development of submerged vegetation.
- a clear or translucent area:The chest x-ray showed a large lucency on the left hemithorax and a collapsed left lung.
- a resplendent quality; radiance or brilliance:I felt a gradation move through what I beheld, like the sweep of lucency across a vast sheet of glazed light.
