Noun
telephone book (plural telephone books)
A printed telephone directory.
Because they are generally quite thick, old telephone books are sometimes used in informal tests of a weapon's cutting ability.
As an example in a telephone book Ärzte main occurs after Adressenverlage main but before Anlagenbauer main (because Ä is replaced by Ae). Source: Internet
Lexicographical comparison means almost everywhere: first character ranks highest — as in the telephone book. Source: Internet