Another word for measure. Measures or Bars divide time in music into small segments with equal beats or pulses in each. Measures make up sections and sections of bars or measures make up form. A common song form is A8, A8, B8, A8 adding up to 32 bars to complete one cycle of the form. Bars are divided by bar lines. In 4/4 there are 4 beats to the bar, in 3/4 there are 3 beats to the bar. Bars make reading music easier because of the clear and equal division of the time. They also make music easier to memorize and understand in terms of form.