authorative

Adjective

authoritative (comparative more authoritative, superlative most authoritative)

1. Arising or originating from a figure of authority.
   • The authoritative rules in this school come not from the headmaster but from the aged matron.

   Synonyms:

   formal, proper, ex cathedra

2. 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.

   Synonyms:

   definitive, of record, precise

3. Having a commanding style.
   • He instructed us in that booming, authoritative voice of his.

   Synonyms:

   grave, magisterial, masterful, oracular, sterling