Definition of bokeh in English:

bokeh

Pronunciation /ˈbōkā/ /ˈboʊkeɪ/

noun

Photography
  • The visual quality of the out-of-focus areas of a photographic image, especially as rendered by a particular lens.

    ‘a quick, visual survey of the foreground and background bokeh of a variety of lenses’
    • ‘It is easily light enough for a handheld supertelephoto lens, but what would the bokeh be like?’
    • ‘Many buy this lens to escape the often poor bokeh of the Vega, but is it really better?’
    • ‘Some folks feel the best bokeh has an undefined, blurred edge.’
    • ‘For me, the 85 Prime's bokeh just feels easier on the eyes.’

Origin

1990s from Japanese boke, apparently shortened from pinboke ‘state of being out of focus’, from bokeru ‘become befuddled’.