Stereophonic sound reproduction; audio played back through two or more separate channels so as to give a sense of spatial distribution. The concert was broadcast in stereo for a richer listening experience.
A device or system for playing recorded music, typically consisting of a radio, CD player, and speakers. The stereo in the car was upgraded to include Bluetooth connectivity.
Stereophonic sound itself; audio recorded or reproduced with two or more channels that create a spatial effect (uncountable). The album was finally released in stereo instead of the old mono mix.
A stereoscopic photograph or pair of images that produces a three-dimensional effect when viewed through a stereoscope. The museum owns dozens of Victorian-era Civil War stereos.