adjective / noun (adjective) (of food) tender, juicy, and tasty; (of a plant) having thick fleshy leaves or stems that store water (noun) a plant of a type that has thick fleshy leaves or stems that store water The word "succulent" contains "suck". Think of a piece of food so juicy and tender that you want to "suck" out all its delicious flavor. For succulent plants, they are so full of water you could almost "suck" it out.