How do you Describe "Beautiful"

I am having a number of arguments with colleagues as to what constitutes "beauty".  My heretical view as an architect is that much of what I see in modern architecture is devoid of humility, a human touch and it ultimately does not move us at a fundamental level the way some things - like a handsome landscape

(Photo:Hayden Cochrane aboard Island Spirit)

or view of dawn at sea - is capable of touching our spirit.  But it is clearly possible to do so with things created by us - in this example, a beautiful short tune composed by a gifted musician played beautifully.