- wave front - all the points just reached by a wave as it propagates
--1 is a kind of propagation
--1 is a part of wave- wave front, wavefront - (physics) an imaginary surface joining all points in space that are reached at the same instant by a wave propagating through a medium
--2 is a kind of surface
- wave front, wavefront - (physics) an imaginary surface joining all points in space that are reached at the same instant by a wave propagating through a medium