noun
second revised edition
Used for books, dictionaries, or other publications that have been revised a second time.
この辞書の再訂版は来年発売される予定です。
The second revised edition of this dictionary is scheduled to be released next year.
初版 is the 'first edition', contrasting with 再訂版 which is a later revision.
Compound of 再 (re-, again), 訂 (revise, correct), and 版 (edition).