Interlock can refer to the following:
Ignition interlock device Interlock (band), an industrial/alternative metal band Interlock (engineering) Interlocking (railway signaling) Interlock (cinema projection) Interlocking tower An interlocked hutch in a synchrotron radiation beamline Interlock protocol, a cryptographic protocol Interlock role-playing system Interlocking spur, landsliding occurring in a river's upper course which modifies the river bed pattern Mechanically-interlocked molecular architectures in supramolecular chemistry Interlock fabric, a double-knitted jersey fabric. Interlocking directorate (business)
Music Hocket, a musical technique Kotekan, a playing style in Balinese Gamelan music