Definitions

1. noun

A person, especially an executive, who has equal authority and responsibility with another, as in a joint headship.

“The coexecutants of the company’s board of directors played a key role in making the crucial decisions.”

2. noun

A person who acts as deputy or assistant to an executive, often having shared authority.

“As the coexecutant to the CEO, she was instrumental in the successful launch of the new product.”