defocus

About 0.09 uses per million words.

Meaning

1. verb To cause (a lens, or a beam of light or particles, etc.) to be out of focus.
2. noun The process of going out of focus.
3. noun The distance by which the focal point is in front of (positive defocus) or beyond (negative defocus) the image or target surface.

Similar words

unfocus filter refocus zoom out space out blur space fade refract sideline

Often followed by

and the of is values value in blur on