high-definition

adjective

high-def·​i·​ni·​tion ˈhī-ˌde-fə-ˈni-shən 

: being or relating to an often digital television system that has either 720 or 1080 scan lines per frame and a wide-screen format

high definition noun

a program broadcast in high definition

Examples of high-definition in a Sentence

Recent Examples on the Web

Well, just one petabyte is equal to roughly 250 million high resolution photos or the storage capacity of 250,000 smartphones or 13 years' worth of continuous high-definition movies. —David Wade, CBS News, 18 June 2026

The world followed the exploits of NASA's Artemis 2 moon mission in near real-time thanks to a high-tech laser link between the astronauts and Earth that enabled high-definition streaming video and images. —Keith Cooper, Space.com, 15 June 2026

This major drop completely eliminates the luxury premium typically required for high-definition streaming architecture, giving audiophiles and design enthusiasts a chance to easily bring home advanced multi-room Wi-Fi audio. —Juhi Wadia, PC Magazine, 10 June 2026

This smart projector has built-in Google Chromecast, high-definition video, and automatic focus. —Olivia Young, Travel + Leisure, 4 June 2026

Word History

First Known Use

1981, in the meaning defined above

Rhymes for high-definition

• academician
• cycloaddition
• decomposition
• diagnostician
• disinhibition
• indisposition
• interposition
• juxtaposition
• mathematician
• metacognition
• metaphysician
• neurotransmission

Kids Definition

high-definition

adjective

: relating to or being a television with a more detailed and sharper picture than usual