Noun
1. a level tract of land
2. a shallow box in which seedlings are started
3. a musical notation indicating one half step lower than the note named
4. freight car without permanent sides or roof
5. a deflated pneumatic tire
6. scenery consisting of a wooden frame covered with painted canvas; part of a stage setting
7. a suite of rooms usually on one floor of an apartment house
Adjective
1. having a horizontal surface in which no part is higher or lower than another;
"a flat desk""acres of level farmland""a plane surface"2. having no depth or thickness
3. not modified or restricted by reservations;
"a categorical denial""a flat refusal"4. stretched out and lying at full length along the ground;
"found himself lying flat on the floor"5. lacking contrast or shading between tones
6. lowered in pitch by one chromatic semitone;
"B flat"7. flattened laterally along the whole length (e.g., certain leafstalks or flatfishes)
8. lacking taste or flavor or tang;
"a bland diet""insipid hospital food""flavorless supermarket tomatoes""vapid beer""vapid tea"9. lacking stimulating characteristics; uninteresting;
"a bland little drama""a flat joke"10. having lost effervescence;
"flat beer""a flat cola"11. not increasing as the amount taxed increases
12. not made with leavening;
"most flat breads are made from unleavened dough"13. parallel to the ground;
"a flat roof"14. without pleats
15. lacking the expected range or depth; not designed to give an illusion or depth;
"a film with two-dimensional characters""a flat two-dimensional painting"16. (of a tire) completely or partially deflated
17. not reflecting light; not glossy;
"flat wall paint""a photograph with a matte finish"18. lacking variety in shading;
"a flat unshaded painting"