a representation, usu. on a flat surface, of selected features of all or a part of the earth or a portion of the heavens, shown in their respective relationships according to some convention of representation.
2. any maplike delineation or representation.
3. function (def. 4a).
v.t.
4. to represent on or as if on a map.
5. to sketch or plan (often fol. by out).
6. Math. to match (an element of a set) with another element in the same or another set.
Idioms:
off the map, out of existence: Cities were wiped off the map.
7. on the map, into prominence: The casino put our town on the map.