Welcome, ZdMh

I don't know the exact answer to your question.
The use of that word is more common for mechanisms that have rotating parts, such as gears, shafts, pulleys, flywheels and sprockets.
In most cases, torque is
transferred between rotating parts via shafts to which they are solidly linked by keys or splines.
Perhaps it is associated to vehicle's
transmission, which includes gear box, shafts, torque converter and differential and which function is to transfer torque from the engine to the rear wheels.
When we combine the concepts of
transmitting torque and the rotational speed of parts, we arrive to the concept of transmission of power.
For other mechanisms, such as linkages, linear actuators, hydraulic cylinders, etc., the word is also used for
transferring of forces from one part to another, but it is less common.
Then, we have the generation and transmission of electric power through interconnected nets.
If produced in a power plant, we again have the case of
transmitting torque and the rotational speed of steam turbines and generators.