Actually I'd say the definition is narrower. Those that broaden the definition call things Aikido when to me they aren't.
Including the training itself.
Loosely ...Training is the activities undertaken to learn to change the body and mind and in time to co-ordinate the two
So (the goal of) aikido is the coordination of body and mind? If I achieve this through training in e.g. singing, then I'm performing aikido?