The American Heritage® Dictionary of the English Language, 4th Edition
n. Either of two large flat triangular muscles running from the base of the occiput to the middle of the back that support and make it possible to raise the head and shoulders.
n. A large vertebrate skeletal muscle divided into an ascending, descending, and transverse portion, attaching the neck and central spine to the outer extremity of the scapula; it functions in scapular elevation, adduction, and depression.
The Century Dictionary and Cyclopedia
n. A large superficial muscle of the back of the neck and adjacent parts.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
n. either of two flat triangular muscles of the shoulder and upper back that are involved in moving the shoulders and arms
Word Usage
"LB Trevor Scott missed the final three practices with a trapezius pull."