plaster
In British English, a "plaster" refers to the small adhesive bandage used for cuts. In American English, this is called a "Band-Aid" or an "adhesive bandage." When referring to the building material (lime and sand), "plaster" is typically an uncountable noun. However, when talking about medical bandages or casts, it is a countable noun.
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The wall's cracking. I'm about to lose it if I can't just plaster this gap.
Unauthorized structural modifications are strictly prohibited. Please cease and desist immediately.
Meanings
A soft mixture of lime, sand, or gypsum, mixed with water and spread on walls or ceilings to produce a smooth or decorative surface.
"The workers applied a fresh layer of plaster to the damaged wall."
A small piece of adhesive material used to cover a cut or wound (British English).
"I put a plaster on my finger after it started bleeding."
A hard cast made of gypsum that is used to keep a broken bone in place.
"He had to wear a plaster cast on his arm for six weeks."
To cover a surface with plaster; or to cover something thickly with a sticky substance.
"They plastered the walls with posters for the upcoming concert."
To apply plaster to a wall or ceiling.
"The room is currently being plastered and cannot be entered."