From The Free On-line Dictionary of Computing (19 January 2023):
permission
access permission
<file system> (Or "file mode") The ability to access (read,
write, execute, traverse, etc.) a file or directory.
Depending on the operating system, each file may have
different permissions for different kinds of access and
different users or groups of users.
chmod ("change mode") is the UNIX command to change
permissions.
(2000-12-07)