A complete collection/works (a compendium of an author's or subject's entire works).
図書館でその作家の全集を借りた。
I borrowed that author's complete works from the library.
全集が全10巻で刊行される予定だ。
The complete works are scheduled to be published in 10 volumes.
趣味で古い全集を集めているコレクターがいる。
There are collectors who gather old complete works as a hobby.