plural cochairpersons
Definition of cochairperson
: one of two or more chairmen who preside jointly over something (such as a meeting, organization, committee, event, or department): cochair, cochairman She was also cochairperson, along with the New York City parks commissioner, of the Evenings-by-the-River committee …— William Edward Nelson He is cochairperson of the Colorado chapter of the Gay, Lesbian, and Straight Education Network …— Wallace Swan
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Time Traveler for cochairperson
The first known use of cochairperson was in 1972
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