1. A film director whose practice accords with the auteur theory; broadly; director
2. An artist (as a musician or writer) whose style and practice are distinctive

ETYM Old Eng. authour, autour, Old Fren. autor, French auteur, from Latin auctor, sometimes, but erroneously, written autor or author, from augere to increase, to produce. Related to Auction.
1. The beginner, creator, or originator of any thing.
2. The writer of a book.

1. A person who has a love of books and especially of reading
2. A person who is involved in the writing, publishing, or selling of books

Composes music as a profession.

ETYM AS. wrîtere.
1. A person who is able to write and has written something.
2. Writes (books or stories or articles or the like) professionally (for pay); SYN. author.

Of or relating to or produced by autoradiography.

Autoradiograph.

A radiogram produced by radiation emitted by the specimen being photographed.
An image produced on a photographic film or plate by the radiations from a radioactive substance in an object which is in close contact with the emulsion.

ETYM Cf. French autorisation.
(Alternate spelling: authorisation).
1. A power delegated from one person to another; SYN. authority.
2. The act of authorizing; SYN. authorisation, empowerment.

Endowed with authority.