JEDEC – no definition offered

TI – The capacitance of an output terminal of the device with the input conditions applied that, according to the product specification, establishes the high-impedance state at the output.

This parameter is the internal capacitance encountered at an output of the device. The values that are given are not production-tested values. Normally, they are typical values given for the benefit of the designer. These values are defined by the design, process, and package of the device.