In English, supersede means (from OED)
To take the place of (something set aside or abandoned); to succeed to the place occupied by; to serve, be adopted or accepted instead of.
The supersede statement
supersede [ option declaration ] ;
If for some option the client should always use a locally-configured
value or values rather than whatever is supplied by the server, these
values can be defined in the supersede statement.
So, for instance, you could write:
supersede host-name "myCoolName";