two-dimensional

adjective

two-di·​men·​sion·​al ˈtü-də-ˈmen(t)-sh(ə-)nəl 

also -dī-

1

: of, relating to, or having two dimensions

The most symmetric of the two-dimensional objects is the circle, because you can rotate it any amount and reflect it over any axis through its center, and it remains exactly the same …

—Tamara M. Davis

… consider a piece of paper, a two-dimensional object. Crumple the paper up. The more tightly it's compressed, the more chaotic are its folds, and the closer the two-dimensional surface moves to becoming a three-dimensional solid.

—John Briggs and F. David Peat

2

: lacking the illusion of depth : not three-dimensional

His violent, nakedly two-dimensional art can be difficult to capture in photographs, depending as it does in great measure on knotty textures and eccentric color schemes for effect.

—Publishers Weekly

3

: lacking depth of characterization

two-dimensional characters

two-dimensionality

ˈtü-də-ˌmen(t)-shə-ˈna-lə-tē 

also -dī-

noun

plural two-dimensionalities

two-dimensionally adverb

This guide … covers thoroughly and in-depth the process of representing the human form two-dimensionally on paper.

—Heather Halliday

Examples of two-dimensional in a Sentence

Recent Examples on the Web

The previously cheerful 10th grader, who doesn't have a driver's license and can make a few basic dishes but isn't used to cooking for himself, faced navigating his teenage years alone, his dad's presence reduced to a two-dimensional image on his phone. — Claudia Boyd-Barrett, CBS News, 18 June 2026

The researchers applied the method to monolayer molybdenum disulfide (MoS2), a two-dimensional semiconductor considered a promising candidate for future transistor channels because it can be manufactured at atomic-layer thickness. — Neetika Walter, Interesting Engineering, 16 June 2026

Throughout Hockney’s 70-year career, picture-making was the constant focus, a complete engagement with and commitment to the idea of creating images on a two-dimensional surface. — Mark Rozzo, Vanity Fair, 12 June 2026

Hannah is perfect as a proxy for the harried viewer—sweet, two-dimensional, as wide-eyed as a Powerpuff Girl but much less feisty. — Sophie Gilbert, The Atlantic, 10 June 2026

Word History

First Known Use

1863, in the meaning defined at sense 1

Rhymes for two-dimensional

• interventional
• nonconventional
• nondimensional
• unconventional
• unintentional
• attentional
• conventional
• dimensional
• extensional
• intensional
• intentional
• multidimensional

Kids Definition

two-dimensional

adjective

: of, relating to, or having two dimensions (as length and width)