Authoritative vs Certified - What's the difference?

Authoritative is a related term of certified.

is arising or originating from a figure of authority.

(certify).

(en adjective)

Arising or originating from a figure of authority

The authoritative rules in this school come not from the headmaster but from the aged matron.

Highly accurate or definitive; treated or worthy of treatment as a scholarly authority

This book is the world's most authoritative guide to insect breeding habits.

Having a commanding style.

He instructed us in that booming, authoritative voice of his.

* (highly accurate) definitive; precise, proper * (from a position of authority) of record

* authoritatively * authoritativeness

(head)

(certify)

to attest to as the truth or meeting a standard

* (to attest as to) attest, witness, vouch for, approve, confirm

* certifiable * decertify