Christopher Columbus chris·top·her·columbus uncommon noun 1. Italian navigator who discovered the New World in the service of Spain while looking for a route to China (1451-1506) SynonymsColumbusChristopher ColumbusCristoforo ColomboCristobal Colon Related words Broader terms navigator WordNet 2.1 (Princeton University). WordNet 2.1 Copyright Princeton University. All rights reserved.