map n. #1. A representation, usually on a plane surface, of a region of the earth or heavens.



Key n.
2 a : a means of gaining or preventing entrance, possession, or control b : an instrumental or deciding factor
3 a : something that gives an explanation or identification or provides a solution b : a list of words or phrases giving an explanation of symbols or abbreviations c : an aid to interpretation or identification : CLUE d : an arrangement of the salient characters of a group of plants or animals or of taxa designed to facilitate identification e : a map legend