/i dish"euhn/ , n.
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.
[ 1545-55; ( edition- (s. of editio ) publication, equiv. to edit ( us ) (ptp. of edere; see EDIT) + -ion- -ION ]