HDRnoun [ U ]
uk/ˌeɪtʃ.diːˈɑːr//ˌeɪtʃ.diːˈɑːr/specializedabbreviation for high dynamic range: the ability of screens on televisions, etc. to show very clear images with a wide range of natural colours, and a lot of contrast between the bright parts of the image and the dark parts:
HDR TV/technology