Cŏl'lar1, n.
n. [Lat. & It. collare, Sp. collar, Pr. colar, Fr. collier, from Lat. collum, neck.]
Sense 1. Any thing worn round the neck as part of a person's dress, or an animal's harness; a necklace for ornament or restraint; as, the collar of a coat; a dog's collar; a gold collar.
Sense 2. (Arch.) (a.) A ring or cincture; the astragal of a column. (b.) A collar-beam. [Rare.] See COLLAR-BEAM. Gwilt.
Sense 3. (Bot.) The neck or line of junction between the root of a plant and its stem. Gray.
Sense 4. (Her.) An ornament worn round the neck by knights, having on it devices to designate their rank or order; as, the collar of the Garter.
Sense 5. (Malacology.) A certain ring-like part of a mollusk in connection with the esophagus, or the mantle. Owen.
Sense 6. (Mech.) A ring-like part of a machine, used commonly for restraining irregularity of motion, or for holding something to its place; as, the collar of a pump or steam cylinder, which is a plate of metal screwed down upon the stuffing-box, with an aperture through which the piston-rod passes; the collar of a shaft, used to prevent the shaft from shifting its place endwise, and the like.
Francis. Ogilvie.
Sense 7. (Naut.) An eye formed in the bight or bend of a shroud, to go over the mast-head; also a strap formed of a rope to which certain parts of rigging, as dead-eyes, are secured. Totten.
Sense 8. (Ornith.) The colored ring round the neck of a bird. Craig.
To slip the collar, to escape or get free; to disentangle one's self from difficulty, labor, or engagement. — Collar of brain, the quantity bound up in one parcel. Johnson.
