エクスルブリスalso: エクスリブリスMeanings1nounex libris; bookplateA label pasted into a book to indicate ownership, often decorative. Used in bibliophilic or library contexts.from Latin彼かれの蔵ぞう書しょにはすべてエクスルブリスが貼はってある。All of his books have an ex libris pasted in.