Is the dictionary wrong in that case?
The dictionary merely catalogues how humans use speech. It's a collection, not authority.
And often times it misses out in context. I would say it defines the feeling of love, but not the overall concept of love or loving.
Feelings are a result. They are also fleeting. They are an emotional reaction.
And a reaction is set in motion by something that is done or experienced (and experiences are caused by actions).