poster board

American

Or posterboard

noun

a thick, fairly stiff cardboard composed of layers of paper or paper pulp compressed together and typically used to support displays.

adjective

of, relating to, or made of poster board.

Other Word Forms

Noun Inflected Forms

poster boards

plural

Etymology

Origin of poster board

First recorded in 1900–05

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

For five decades, the Ecuadorian siblings have created signs for stores using poster board and markers.

From The Wall Street Journal • Apr. 22, 2026

They simply plugged in the numbers they could easily find, fudged the rest and threw it on a poster board.

From Salon • Apr. 5, 2026

In bright red paint, a message on a poster board shone: “We love you, Beautiful Altadena.”

From Los Angeles Times • Jan. 11, 2025

Outside the gym, a large pink poster board advertised a designated missing persons tent where Maui residents can add the list of the missing - estimated to be up to 1,000.

From BBC • Aug. 13, 2023

Reaching down under our seats, we each take out a poster board rectangle, which we hold to our chests as we stand up.

From "The Misfits" by James Howe

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023