A work created jointly by two or more people; collaboration in producing a single piece.
この絵本はイラストレーターと作家の共作で生まれた。
This picture book was born from a collaboration between an illustrator and an author.
展覧会では国内外のアーティストの共作が展示されている。
The exhibition displays joint works by domestic and international artists.
二人の研究者による共作論文が学会で発表された。
A coauthored paper by two researchers was presented at the conference.