The Collaborative International Dictionary
CB \CB\ n. same as citizens' band; that portion of the radio frequency spectrum allocated by the FCC for the use of individual citizens for short-distance personal or business use, from either fixed or mobile stations. Also used attributively, as
CB radio. [acronym]
Syn: Citizens' Band.
Wiktionary
n. 1 A publicly available system of short-distance radio communications, usable by individuals or businesses without a license. 2 A radio transceiver capable of operating on the band designated for this system.
Usage examples of "cb radio".
I was busy exploring this hotel, right after I checked in with you on my CB radio, hunting for Seldom Seen Sam's room where he told me he kept his uranium ore specimens.
A CB radio and a police scanner were bolted to the underside of the dash.
Kendall restored the CB radio to its belt case and then shifted the electric lantern's beam to cover the doorway to the cellar.
Up in one comer, a CB radio was roaring and babbling away for background noise.
We got a lady in Cisco takes phone calls for us and relays them to the ranch via CB radio.