Word forms: plural route maps1. countable nounA route map is a map that shows the main roads in a particular area or the main routes used bybuses, trains, and other forms of transport in a particular area.
2. countable nounIf you describe one thing as a route map for another thing, you mean that it provides a model showing the best way to achieve or describe it.
...a route map of human evolutionary history. [+ of]