Belem be·lem US/ˌbɛˈlɛm/ uncommon noun 1. port city in northern Brazil in the Amazon delta; main port and commercial center for the Amazon River basin SynonymsParaFeliz LusitaniaSanta Maria de BelemSt. Mary of Bethlehem Related words Word family belemnitebelemniticBelemnitidaeBelemnoidea Broader terms cityport Parts Brazil WordNet 2.1 (Princeton University). CMU Pronouncing Dictionary. WordNet 2.1 Copyright Princeton University. All rights reserved.