poster board

American  

Or posterboard

noun

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

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adjective

1. of, relating to, or made of poster board.

Etymology

Origin of poster board

First recorded in 1900–05

Example Sentences

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

At his laptop in London last week, he watched as the president unveiled a poster board outlining tariff rates, some as high as 50%, for imports from countries around the world.

From BBC • Apr. 10, 2025

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

From Los Angeles Times • Jan. 11, 2025

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