cochair

plural cochairs

1. Someone who serves as the chair of a meeting or organization together with one or more other chairs.

   "On the referendum, people are asked to vote yes or no," says Hoyt, who is cochair of the Coalition for Lower Electric Rates[…].

   1988 February 19, Ben Joravsky, “A referendum gorws in the 47th Ward: boosting the current against Com Ed rate hikes”, in Chicago Reader

present singular third person cochairs · participle present cochairing · participle past cochaired · past cochaired

1. transitiveTo chair (a meeting) jointly.