2D

American  

[too-dee] / ˈtuˈdi /

Or 2-D

adjective

1. of, relating to, or representing something in two dimensions; two-dimensional.

   2D computer graphics.

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noun

1. a two-dimensional form or appearance.

   The theater is showing that film in 2D and in 3D.

Etymology

Origin of 2D

First recorded in 1960–65

Example Sentences

Scientists found that when 2D materials are paired with insulating layers required for electronic devices, an unavoidable atomic-scale gap forms between them.

From Science Daily • May 9, 2026

According to the researchers, many studies have focused heavily on the impressive properties of 2D materials themselves while paying less attention to the interfaces formed inside complete devices.

From Science Daily • May 9, 2026

This rapid workflow produced stacks of 2D images that researchers later combined to create full 3D models.

From Science Daily • Mar. 10, 2026

"I couldn't even imagine the lesion like this. I'd only ever seen it in 2D."

From Science Daily • Feb. 15, 2026

One heir had not invited them in, but that didn't stop Sydelle Pulaski from barging into apartment 2D.

From "The Westing Game" by Ellen Raskin