Definition of grouper

• n. - One of several species of valuable food fishes of the genus Epinephelus, of the family Serranidae, as the red grouper, or brown snapper (E. morio), and the black grouper, or warsaw (E. nigritus), both from Florida and the Gulf of Mexico.
• n. - The tripletail (Lobotes).
• n. - In California, the name is often applied to the rockfishes.