Alternate Definitions for Wave

Periodic or quasi-periodic (AC) variations ofphysical quantities in time and space, capable of propagating or beingtrapped within particular regimes.

Data resulting from observations of wave experiments
and natural wave phenomena. Wave experiments are
typically active and natural wave phenomena are passive.
Examples of wave experiments include
coherent/incoherent scatter radars, radio soundings, VLF
propagation studies, ionospheric scintillation of beacon
satellite signals, etc. Examples of natural wave
phenomena include micropulsations, mesospheric gravity
waves, auroral/plasmaspheric hiss, Langmuir waves,
AKR, Jovian decametric radiation, solar radio bursts, etc.