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

In it, a crescent of Earth’s blue vitality hovers amid the blackness of space, above a high-definition brownish gray wasteland of lunar craters. —Meghan Bartels, Scientific American, 22 Apr. 2026

Based on the Boeing 737, the aircraft is equipped with a bank of computer stations, cutting-edge radar technology, a high-definition camera, torpedoes, and up to 129 marine sensors known as sonobuoys. —Alan Crawford, Bloomberg, 20 Apr. 2026

The cameras in the operations centers mostly have high-definition signals displayed on the big monitors, but the size of the files for those signals is enormous and a big burden if CDOT kept the visuals. —Alan Gionet, CBS News, 17 Apr. 2026

The high-definition footage showed other places where the railing had collapsed. —Zoey Lyttle, PEOPLE, 17 Apr. 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