Pronunciation: (ster"ē-u-fon'ik, stēr"-),[key] —adj. pertaining to a system of sound recording or reproduction using two or more separate channels to produce a more realistic effect by capturing the spatial dimensions of a performance (the location of performers as well as their acoustic surroundings), used esp. with high-fidelity recordings and reproduction systems (opposed to monophonic). Cf. quadraphonic.