1. present participle of coannex; to annex or incorporate jointly with another party or entity
Usage: rare; formal; chiefly historical or legal contexts

Examples

• The two nations were coannexing the disputed territory under a shared agreement.
• The treaty outlined the process of coannexing the border regions.
• They discussed coannexing the adjacent lands to expand their jurisdiction.
• The colonial powers were coannexing territories in Africa during the late 19th century.