Technically, a true first edition should be designa- ted “first edition, first printing,” a phrase that describes a copy from the first print run of a book’s first edition. A first edition may actually go through many printings before its text is significantly changed, usually to correct one or more errors. When the book goes back to press after such a change, it is in its second edition. Subsequent major changes require new editions—third, fourth, etc. But for collectors, “first edition” has become the shorthand term for a copy from the first printing of the first edition.
First trade edition
The first regularly published edition for release to the book trade and the general public. This may be the true first edition, or it may be preceded by a first limited edition.