Definitions

1. adjective

Not having or using a lens, especially a camera lens.

“The photographer had to use a camera with a lensless attachment to take pictures underwater.”

2. adjective

Lacking the focusing ability of a lens.

“The old microscope had a lensless design that made it difficult to observe specimens.”

3. noun

A lensless optical system or device.

“The researchers developed a new lensless imaging technique using artificial intelligence.”