B's

noun pl. B's, b's

1. the second letter of the English alphabet: from the Greek beta, a borrowing from the Phoenician
2. any of the speech sounds that this letter represents, as, in English, the (b) of boat
3. a type or impression for b or B
4. the second in a sequence or group
5. an object shaped like

adjective

1. of b or B
2. second in a sequence or group
3. shaped like