IPA: /ˈkoʊˌhoʊst/
KK: /ˈkoʊˌhoʊst/
A person who shares the responsibility of hosting an event or program with another person.
She will cohost the charity gala with her friend this year.
To host an event or program together with someone else.
She will cohost the charity gala with her friend this year.
Past: cohosted
Past Participle: cohosted
Cohost → It is formed from "co-" (meaning together) and "host" (from Old French *hoste*, meaning a person who receives or entertains guests). The word "cohost" means a person who hosts an event together with another host.
Think of two people hosting an event "together" ('co-') — that's what a cohost does.