CIMM DEFINITION: Can either mean terrestrial television signals that are not transmitted digitally or, with cell phones, the ability to distribute and upgrade software wirelessly.

2: Households that receive broadcast signals only on their television sets, with no connection to cable, satellite or another form of  Alternate Delivery System (ADS).  An individual, operating TV set in the home can also be designated as OTA if it has no such connection as described above. (Source: Rentrak)