Wiktionary
man page
alt. A helpfile in Unix and Unix-like operating systems n. A helpfile in Unix and Unix-like operating systems
Wikipedia
Man page
A man page (short for manual page) is a form of software documentation usually found on a Unix or Unix-like operating system. Topics covered include computer programs (including library and system calls), formal standards and conventions, and even abstract concepts. A user may invoke a man page by issuing the man command.
By default, man typically uses a terminal pager program such as [[more (command)|more]] or [[less (Unix)|less]] to display its output.