The popularity of South Korean popular culture in other countries since the 1990s.

(physics) A powerful compression wave produced by the movement of a body through a fluid or gas at a velocity greater than the local speed of sound. / Any violent disturbance.

(dated) a heat wave

(physics) A fluctuation in spacetime caused by accelerating mass, which propagates as a wave at the speed of light. / (dated, proscribed) A gravity wave.

(physics) electromagnetic radiation having a wavelength between about .5 centimeters and 30,000 meters; used for the broadcasting of radio and television signals.

A large and sudden rise and fall in the tide. / (proscribed) A large, sudden, and disastrous wave of water caused by a tremendous disturbance in the ocean; a tsunami. (See Usage notes below.)

(trigonometry, signal processing) A periodically oscillating waveform as described by the sine function, possibly multiplied by some amplitude, shifted by some phase, and translated by an additive constant.

(physics) Electromagnetic radiation, such as light and radio waves.

(physics) A wave that can be modulated, either in amplitude, frequency, or phase, to carry or transmit images, music, speech, or other signals.

(idiomatic) A period of exceptionally hot weather. / (US, weather broadcasting) Three consecutive days with daytime high temperature of 90 degrees Fahrenheit or higher.