blur; lack of focus; unsharpness
Refers to a blurred or out-of-focus state, especially in photography or vision.
This photo is badly blurred.
This lens produces a beautiful background blur.
Usually written in kana; katakana is common for this meaning.
Kanji form is rare and may not be recognized by many readers.
From the verb ぼける (to be blurred). The katakana spelling ボケ is common for this noun sense.