Definitions

1. verb

to shift one’s attention away from something, especially a central point or goal

“The camera needed to be adjusted to defocus the background.”

2. verb

to lose sharpness or clarity, especially of mental focus or vision

“The long hours and lack of sleep caused her to defocus and make careless mistakes.”

3. noun

the state of being distracted or having a lack of focus

“The defocus caused by the noisy environment made it difficult to concentrate.”