- noun the size of something from side to side
- noun the distance of something measured from side to side, compared to length
- The horizontal distance from a point or surface, such as an end, to another given point or surface, such as the other end. For example, the width of a displayed TV picture.
- For a given pulse, the time interval that elapses between the end of the rise time and the start of the decay time. The width may also be defined in other manners, such as the time interval between the 50% points of peak pulse amplitude. Also called pulse duration (1).