In political science, the 'Third Wave' refers to the third wave of democratisation that occurred during the overthrow of dictatorships in the 1970s, especially in Greece, Spain, and Portugal.

3rd wave ska is the third wave ska movement that started in the 1980s.

Countries that got democracy post 1974 are called third wave countries. e.g. nepal

Mariel Boat Lift was the second wave of immigration. The third wave occurred during Cuba's Special Period in 1994 and they are called Balseros.

Waves is a noun (the plural form of wave) and a verb (third person singular conjugation of wave).