(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.

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

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.)

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

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

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

(neurology) An electrical signal produced by the brain while the subject is relaxed.

(neurology) An electrical signal produced by the brain while the subject mentally active.

A short watercraft seating one rider, propelled by a two-ended paddle, designed for surfing waves.

A deep artificial wave in the hair produced by heated curling tongs.