Pronunciation: (i-dish'un), [key]
1. one of a series of printings of the same book, newspaper, etc., each issued at a different time and differing from another by alterations, additions, etc. (distinguished from impression).
2. the format in which a literary work is published: a one-volume edition of Shakespeare.
3. the whole number of impressions or copies of a book, newspaper, etc., printed from one set of type at one time.
4. a version of anything, printed or not, presented to the public: the newest edition of a popular musical revue.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.