noun. aquatic carnivorous mammal having a streamlined body specialized for swimming with limbs modified as flippers.
1. Verb, past participle The California sea lion is the most abundant and common pinniped in California, followed by northern elephant seals, according to the NOAA's National Marine Fisheries Service Southwest Regional Office. 2. Adjective Sea lions, walruses and other members of the pinniped family can use their larger and stronger flippers to “walk” on land. 3. Noun, singular or mass Sea lions are a type of pinniped, an order of marine mammals that also includes seals and walrus.