pixel

noun

pix·​el ˈpik-səl 

-ˌsel

plural pixels

1

: any of the small discrete elements that together constitute an image (as on a television or digital screen)

… the number of pixels determines how sharp and realistic the image looks.

—Leslie Meredith

2

: any of the detecting elements of a solid-state optical sensor (such as a CCD or CMOS device)

The team used a new CCD detector that has an 8,192 by 8,192 pixel array, which makes it the world's largest astronomical CCD.

—Astronomy

the … CMOS image sensor provides a 9-µm pixel size …

—Mathew Dirjish

Did you know?

Is it pixelated or pixilated?

Pixelated is used to describe digital images in which individual pixels are discernable, as when you look closely at a large photo and can see the tiny dots that make up the image. Pixilated (coined from pixie, a pixie being a cheerful, mischievous sprite) is usually used to describe things considered whimsical, or people who seem dazed or lost in thought. While pixelated is a late 20th century coinage, pixilated has been in use since the mid-19th century.

Examples of pixel in a Sentence

Recent Examples on the Web

But while some video AI models try to predict pixels frame-by-frame, LeCun’s work is designed to function at a higher level of abstraction to better correspond to objects and concepts. —Jeremy Kahn, Fortune, 23 Jan. 2026

The system combines the images so every pixel is in focus, even in complex areas like the creases of the nose or beneath the eyes. —Craig S. Smith, Forbes.com, 21 Jan. 2026

Most Panasonic camcorders shoot at either 1080 pixels or 4K resolution. —Bestreviews, Chicago Tribune, 19 Jan. 2026

According to the team, when a single laser beam passes through a metasurface, the pixels shape the light into thousands (or hundreds of thousands) of tightly focused laser spots simultaneously. —Georgina Jedikovska, Interesting Engineering, 15 Jan. 2026

Word History

Etymology

pix + element

First Known Use

1965, in the meaning defined at sense 1

Kids Definition

pixel

noun

pix·​el ˈpik-səl 

-ˌsel

: any of the small elements that together make up an image (as on a television screen) or sensor (as in a camera)

Etymology

from pix, an altered form of pictures, and element