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

Instead of dotting the same black scrim, like pinholes in a two-dimensional theater backdrop, the stars were scattered through space at dramatically varying distances, a vast swarm of them filling every last corner of an even vaster, more numinous, and emphatically three-dimensional darkness. —Michael Pollan, The Atlantic, 26 Jan. 2026

Recreating Edison’s bulb Graphene is a single-atom-thick, two-dimensional sheet of carbon atoms that is arranged in a hexagonal honeycomb lattice. —Georgina Jedikovska, Interesting Engineering, 26 Jan. 2026

More modern analytical methods (such as two-dimensional gas chromatography and Raman spectroscopy) are now being used to profile and differentiate dragon’s blood resins from different species. —Scott Travers, Forbes.com, 21 Jan. 2026

Since the rhino is a two-dimensional surface that lives in three-dimensional space, the mathematicians had expected these lines to carve out paths throughout 3D space as well. —Elise Cutts, Quanta Magazine, 20 Jan. 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)