American lobster ame·ri·can·lobster uncommon noun 1. flesh of cold-water lobsters having large tender claws; caught from Maine to the Carolinas SynonymsAmerican lobsterNorthern lobsterMaine lobster 2. lobster of Atlantic coast of America SynonymsAmerican lobsterNorthern lobsterMaine lobsterHomarus americanus Related words Broader terms true lobsterlobster Parts American lobsterHomarus Part of American lobster WordNet 2.1 (Princeton University). WordNet 2.1 Copyright Princeton University. All rights reserved.