is similar to
sanctioned by established authority
"an authoritative communique"; "the authorized biography"
is similar to
by virtue of an office or position
"the head of the department serves as an ex officio member of the board"
is similar to
characteristic of or befitting a person in authority
"formal duties"; "an official banquet"
is similar to
given formal standing or endorsement; made official or legitimate by the observance of proper procedures
is similar to
having some official authority or sanction
see also
endowed with authority