Definitions of lobster

1. any of several edible marine crustaceans of the families Homaridae and Nephropsidae and Palinuridae

2. Any large macrurous crustacean used as food, esp. those of the genus Homarus; as the American lobster ( H. Americanus), and the European lobster ( H. vulgaris). The Norwegian lobster ( Nephrops Norvegicus) is similar in form. All these have a pair of large unequal claws. The spiny lobsters of more southern waters, belonging to Palinurus, Panulirus, and allied genera, have no large claws. The fresh- water crayfishes are sometimes called lobsters.

3. A large shellfish used as food.

4. Crustaceous marine animal with large claws and a tail.

5. A large marine crustacean used as food.

6. A shell- fish, much esteemed for food, of a red colour when boiled.

7. A well- known crustacean, having a many- jointed body and large claws.