cb meaning in English

n. cb, citizens band, range of radio frequencies set aside for two-way radio communication by citizens and businesses (in the usa); radio receiver/transmitter used to communicate on citizens band frequencies
credit card, plastic card with a magnetic strip given to a customer by a bank or other business for the purpose of making purchases on credit, charge card, charge platecb (carte bancaire)
columbic, of columbium (chemical element)