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.

For more information on wave front, visit Britannica.com.

Of a sound wave, a continuous, imaginary surface which is the locus of points having the same phase at a given instant.

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Note: click on a word meaning below to see its connections and related words.

The noun has 2 meanings:

Meaning #1: all the points just reached by a wave as it propagates

Meaning #2: (physics) an imaginary surface joining all points in space that are reached at the same instant by a wave propagating through a medium
  Synonym: wavefront

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