I. ster ‧ e ‧ o 1 /ˈsteriəʊ, ˈstɪər- $ ˈsterioʊ, ˈstɪr-/ BrE AmE noun ( plural stereos )
1 . ( also ˈstereo ˌsystem ) [countable] a machine for playing records, ↑ CD s etc that produces sound from two ↑ speaker s :
a stereo with good speakers
on a stereo
He was listening to the Beatles on the car stereo.
2 . in stereo if sound is played or broadcast in stereo, it is directed through two speakers
⇨ ↑ personal stereo
II. stereo 2 BrE AmE ( also ster‧e‧o‧phon‧ic ) /ˌsteriəˈfɒnɪk◂, ˌstɪər- $ ˌsteriəˈfɑːnɪk◂, ˌstɪr-/ adjective
[ Date: 1900-2000 ; Origin: stereophonic (1900-2000) , from Greek stereos 'solid' + English phonic ]
using a recording or broadcasting system in which the sound is directed through two ↑ speaker s ⇨ mono , quadraphonic :
stereo equipment