A musical unit representing a series of beats [2] (rhythmic stresses) with one primary or accented stress. A measure is also called a bar because the end of a measure is represented in musical notation by a vertical bar
Russ Rowlett (Director), How Many? A Dictionary of Units of Measurement, Center for Mathematics and Science Education University of North Carolina, USA 2005. http://www.unc.edu/~rowlett/units/dictA.html, (Unit of Meas and Covr Factors - Amer) {608}