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

We cut out pictures, did the poster board and everything.

From Los Angeles Times • Feb. 7, 2025

Lummi matriarch Ellie Kinley traced her finger across generations of her relatives’ names in a handwritten family tree on a poster board on her living room floor.

From Seattle Times • Jan. 15, 2024

In the middle of the night, I’d had a vision of the window framed in poster board stitched with super-bulky yarn like the edge of a quilting square.

From "Hope Springs" by Jaime Berry

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