Earmuffs are two pads on a band that keep the ears warm. A pair of earmuffs, wear earmuffs, fold the earmuffs away.
The word is plural only, like glasses. The other kind is protective: earmuffs on a building site or a firing range cut noise, and they are rated by how many decibels they take off.
1nounearmuffsTwo pads on a band that keep the ears warm.
“She put on her woolly hat and earmuffs before going out into the snow.”
earmuffs is a covering.