Yellow Pages

US: /ˈjɛloʊ ˌpeɪdʒɪz/

Collins Concise English Dictionary © HarperCollins Publishers::

Yellow Pages noun:plural

1. a classified telephone directory, often printed on yellow paper, that lists subscribers by the business or service provided

WordReference Random House Learner's Dictionary of American English © 2025

yel•low pag•es /ˈyɛloʊ ˌpeɪdʒɪz/  n.  [countable* often: Yellow Pages]

1. a telephone directory or section of a directory listing names of businesses classified according to the type of business or service they offer, usually printed on yellow paper: [used with a singular verb]
   The Yellow Pages doesn't seem to list that company.
   [used with a plural verb]
   The Yellow Pages are on the desk.

WordReference Random House Unabridged Dictionary of American English © 2025

yel′low pag′es, (often caps.)

1. a classified telephone directory or section of a directory, listing subscribers by the type of business or service they offer, usually printed on yellow paper. Cf. white pages. 

• 1950–55