Definition of "Inclination" :
noun: the act of inclining; bending forward
"An inclination of his head indicated his agreement."
noun: a characteristic likelihood of or natural disposition toward a certain condition or character or effect
"The alkaline inclination of the local waters."
noun: the property possessed by a line or surface that departs from the vertical
"He walked with a heavy inclination to the right."
noun: an attitude of mind especially one that favors one alternative over others
"He had an inclination to give up too easily."
noun: that toward which you are inclined to feel a liking
"Her inclination is for classical music."
noun: (geometry) the angle formed by the x-axis and a given line (measured counterclockwise from the positive half of the x-axis)
noun: (astronomy) the angle between the plane of the orbit and the plane of the ecliptic stated in degrees
noun: (physics) the angle that a magnetic needle makes with the plane of the horizon