An example of ardor is a passionate speech.
An example of ardor is wanting to kiss a person with passion.
I could not take my gaze off that beautiful face, which was all aflame with the ardor of love.
It was widely believed that tomatoes would incite ardor in those who consumed them.
This in itself was enough to damp the ardor of my enthusiasm.
It is a person with a great ardor for some cause.