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

Among them, two-dimensional (2D) semiconductors are gaining traction as a promising post-Moore pathway, offering atomically thin structures that could enable continued transistor scaling while improving energy efficiency and performance. —Bojan Stojkovski, Interesting Engineering, 12 Apr. 2026

The cantilevers contain a thin layer of aluminum nitride, a piezoelectric which expands or contracts under voltage, thus moving the micromachine up and down and enabling the array to scan beams of light over a two-dimensional area. —IEEE Spectrum, 9 Apr. 2026

The set stayed two-dimensional, flat, a place observed but never inhabited. —Tim Requarth, Longreads, 9 Apr. 2026

What to read next By contrast, SWOT offers a wide, two-dimensional view of the ocean surface, capturing wave direction, spacing, and curvature with centimeter-level precision. —Stefanie Waldek, Space.com, 7 Apr. 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)