abbreviation for high definition: a system for showing very clear pictures on a television or computer screen or for producing very clear sound
With high def, you can recognize faces in the crowd.使用高清晰度技术，你可以从人群中识别人脸。
high-def
adjectiveuk/ˈhaɪˌdef/us/ˈhaɪˌdef/
高清晰度的（high definition的缩写）
abbreviation for high-definition: used to describe a system for showing very clear pictures on a television or computer screen or for producing very clear sound