Atlas/ˈætləs/ Definition 1 of 5Pro Tip 1/3Travel Preparation Use 'atlas' when planning routes for travel or understanding geography. Consult the atlas to find the best highways. Pro Tip 2/3Educational Tool 'Atlas' indicates a learning resource in schools and universities. The geography teacher asked us to bring our atlases. Pro Tip 3/3Variety of Maps An 'atlas' can include different kinds of maps, such as political or physical. My world atlas contains both climate and topographical maps.