Address book

/ɐdɹˈɛs bˈʊk/

Address book

a notebook that is used for recording addresses, phone numbers, and names of different people

(computing) a piece of software that is used to store people's names, emails, phone numbers, etc.

Examples

1. People always had address books on their mobile phones.

2. The internet's address book grew from just 4.3 billion unique addresses to 340 undecillion.

3. So Adrian had an address book.

4. Meanwhile, the virus would send itself to everyone in your address book.