To make a deep, short noise, as a hog; to utter a short groan or a deep guttural sound.

A deep, guttural sound, as of a hog.

Any one of several species of American food fishes, of the genus Hæmulon, allied to the snappers, as, the black grunt (A. Plumieri), and the redmouth grunt (H. aurolineatus), of the Southern United States; -- also applied to allied species of the genera Pomadasys, Orthopristis, and Pristopoma. Called also pigfish, squirrel fish, and grunter; -- so called from the noise it makes when taken.

any species of bony spiny-rayed fishes in the family Haemulidae. Grunts are medium-sized tropical fishes that are capable of making a grunting sounds by the grinding of pharyngeal teeth.They inhabit coral reef or hard bottom areas. Many forage at night over nearby sand and grass flats Diagram of the chemical structure of guanine, one of the four nitrogenous bases in DNA.

Army or Marine enlisted man. Often used in language school.

the short low gruff noise of the kind made by pigs

medium-sized tropical marine food fishes that utter a grunting sound when caught

issue a grunting, low, animal-like noise; "He grunted his reluctant approval"