mat

noun

1.
a thick flat pad used as a floor covering
2.
mounting consisting of a border or background for a picture
matting
3.
sports equipment consisting of a piece of thick padding on the floor for gymnastic sports
gym mat
4.
a mass that is densely tangled or interwoven
5.
the property of having little or no contrast; lacking highlights or gloss
flatness lusterlessness lustrelessness matt matte
Derived from:
mat
6.
a foundation (usually on soft ground) consisting of an extended layer of reinforced concrete
raft raft foundation
7.
a small pad of material that is used to protect surface from an object placed on it