A small square cardboard mat, often with an advertisement for a brewery on it, that is used to rest one's glass on, and to protect the surface of a table or a bar in a pub.

A small mat used next to a bathtub to absorb water and thus prevent slipping.

A sheet of durable smooth material that is placed on a floor space occupied by a chair (typically one equipped with casters) to prevent undue wear.

(chiefly US, idiomatic) To continue to struggle or fight until either victorious or defeated.

A prayer rug.

A waterproof and easily washable sheet used to collect food dropped by a small child while eating, or otherwise to protect easily soiled surfaces.

A protective table mat, usually heat-resistant, for a single setting of plates and dishes.

(Britain) A mouse pad.

an accumulation of filamentous algae, either freely floating or rolling along the sea bed. / a mass of diatoms etc. covering soft bottoms.

Alternative form of hazmat