| a surface, real or imaginary, that is the locus of all adjacent points at which the phase of oscillation is the same. |
| wave front n. The continuous line or surface including all the points in space reached by a wave or vibration at the same instant as it travels through a medium. |
| wave front
The set of points in space reached by a wave or vibration at the same instant as the wave travels through a medium. Wave fronts generally form a continuous line or surface. The lines formed by crests of ripples on a pond, for example, correspond to curved wave fronts. |