Transmit power is the power of high-frequency transmitters.
Transmitter output power is the power emitted at the RF output of a transmitter
Radiated power or ERP (effective radiated power) is the radiated power in relation to a reference antenna, i.e. the antenna gain is included in the calculation here
Transmitter input power is the power absorbed by the transmitter. The efficiency is calculated from the transmitter input power and transmitter output power.