[v. koh-hohst, koh-hohst; n. koh-hohst] 
Radio and Television.| 1. | to host (a program) jointly with another. |
| 2. | a person who co-hosts. |
| co·host or co-host (kō'hōst') n. A joint host, as of a social event. tr.v. co·host·ed or co-host·ed, co·host·ing or co-host·ing, co·hosts or co-hosts To serve as a joint host of: "In 1980, [he] co-hosted another event for large contributors" (New Yorker). |