plural plasters
1
a
: a wet substance that hardens when it becomes dry and that is used to make smooth walls and ceilings
—often used before another noun
plaster walls
b
2
British
: a piece of material that is put on the skin over a small wound
plasters; plastered; plastering
1
a
: to cover (a surface) with plaster
We plastered and sanded the walls before painting them.
b
: to cover (a surface or area) with something
They plastered the walls with posters.
—usually used as (be) plasteredThe walls were plastered with posters.
The Web page is plastered with ads.
2
: to put (something, such as a poster or sign) on a surface
Someone had plastered a political poster on the wall.
—often used figurativelyHe had a silly smile plastered on his face. [=he was smiling in a silly way]
3
: to make (something) lie flat against or stick to something
His clothes were plastered to his body from the rain.
He plastered his hair down/back with gel.
Cite this Entry
“Plaster.” Merriam-Webster.com Simple Definition, Merriam-Webster, https://www.merriam-webster.com/simple/plaster. Accessed 14 Jun. 2026.
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