[in-ter-fohn] 
| 1. | an intercommunication system using telephones to connect offices, stations, etc., as in a building or ship; intercom. |
| 2. | a telephone used in such a system. |
| in·ter·phone (ĭn'tər-fōn') n. A telephone used in a small closed system of telephones: "The sergeant lifted the interphone and told the pilot that the door was properly sealed" (Tom Clancy). |