4. (noun)mat a mass that is densely tangled or interwoven "a mat of weeds and grass"
5. (noun)Master of Arts in Teaching, MAT a master's degree in teaching
6. (noun)flatness, lusterlessness, lustrelessness, mat, matt, matte the property of having little or no contrast; lacking highlights or gloss
7. (adj)mat a small pad of material that is used to protect surface from an object placed on it
8. (verb)flat, mat, matt, matte, matted not reflecting light; not glossy "flat wall paint"; "a photograph with a matte finish"
9. (verb)entangle, tangle, mat, snarl twist together or entwine into a confusing mass "The child entangled the cord"
10. (verb)felt, felt up, mat up, matt-up, matte up, matte, mat change texture so as to become matted and felt-like "The fabric felted up after several washes"
2. (noun)mat a name given by coppersmiths to an alloy of copper, tin, iron, etc., usually called white metal
3. (noun)mat a fabric of sedge, rushes, flags, husks, straw, hemp, or similar material, used for wiping and cleaning shoes at the door, for covering the floor of a hall or room, and for other purposes
4. (noun)mat any similar fabric for various uses, as for covering plant houses, putting beneath dishes or lamps on a table, securing rigging from friction, and the like
5. (noun)mat anything growing thickly, or closely interwoven, so as to resemble a mat in form or texture; as, a mat of weeds; a mat of hair
6. (noun)mat an ornamental border made of paper, pasterboard, metal, etc., put under the glass which covers a framed picture; as, the mat of a daguerreotype
Sense: a flat piece of material (rushes, rubber, carpet, cork etc) for wiping shoes on, covering a floor, or various other purposes Wipe your shoes on the doormat; a table mat.
Definitions of mat 
Afrikaans: mat
Arabic: قِطْعَة مَسِح
Bulgarian: черга
Brazilian: tapete
Czech: rohož; krytina; podložka
German: die Matte, der Untersetze
Danish: måtte; -måtte; dækkeservi
Greek: χαλάκι, σουβέρ
Spanish: estera, felpudo
Estonian: matt
Farsi: زیر پایی
Finnish: matto
French: (petit) tapis
Hebrew: שְׁטִיחוֹן
Hindi: चटाई
Croatian: prostirač
Hungarian: lábtörlő; alátét
Indonesian: keset
Icelandic: motta
Italian: tappetino
Japanese: マット
Korean: 매트, 돗자리
Lithuanian: patiesalas, demblys
Latvian: paklājiņš; kājslauķis; se
Malay: tikar
Dutch: mat
Norwegian: matte; løper; (kuvert)bri
Polish: mata, wycieraczka
Persian: زیر پایی
Pashto: پاپوښ
Portuguese: tapete
Romanian: preş; muşama
Russian: коврик; салфетка
Slovak: rohož; krytina; podložka
Slovenian: preproga
Serbian: otirač
Swedish: matta, liten duk
Thai: เสื่อ
Turkish: paspas, altlık
Taiwanese: 蓆子，墊子
Ukrainian: рогожа; килимок
Urdu: چٹائی، فرش، پا انداز
Vietnamese: chiếu; thảm chùi chân
Chinese: 席子，垫子
