Definitions for "Tropical wave"
A cluster of clouds and/or thunderstorms with little or no circulation* or strong wind.
a trough at low latitudes
An area of converging air (and relatively low air pressure) that is embedded within the deep easterlies. May lead to tropical cyclone development.
An area of disorganized convection in the tropics.
A system of convection, stronger waves may become more organized and develop into Tropical Depressions.