v. t. [ imp. & p. p. Grunted; p. pr. & vb. n. Grunting. ] [ OE. grunten; akin to As. grunian, G. grunzen, Dan. grynte, Sw. grymta; all prob. of imitative; or perh. akin to E. groan. ] To make a deep, short noise, as a hog; to utter a short groan or a deep guttural sound. [ 1913 Webster ]

Who would fardels bear,
To grunt and sweat under a weary life. Shak. [ 1913 Webster ]

Grunting ox (Zool.), the yak. [ 1913 Webster ]

n. 1. A deep, guttural sound, as of a hog. [ 1913 Webster ]

2. (Zool.) Any one of several species of American food fishes, of the genus Haemulon, allied to the snappers, as, the black grunt (Haemulon Plumieri), and the redmouth grunt (Haemulon 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. [ 1913 Webster ]

3. A U. S. infantryman; -- used especially of those fighting in the war in Vietnam. [ slang ] [ PJC ]

n. 1. One who, or that which, grunts; specifically, a hog. “Bristled grunters.” Tennyson. [ 1913 Webster ]

2. (Zool.) One of several American marine fishes. See Sea robin, and Grunt, n., 2. [ 1913 Webster ]

3. (Brass Founding) A hook used in lifting a crucible. [ 1913 Webster ]

adv. In a grunting manner. [ 1913 Webster ]

v. i. [ Freq. of grunt. ] To grunt; to grunt repeatedly. [ Obs. ] [ 1913 Webster ]

n. A young hog. [ 1913 Webster ]