Inclination
noun
an attitude of mind especially one that favors one alternative over others
“he had an inclination to give up too easily”
Similar: disposition, tendency
noun
(astronomy) the angle between the plane of the orbit and the plane of the ecliptic stated in degrees
Similar: inclination of an orbit
noun
(geometry) the angle formed by the x-axis and a given line (measured counterclockwise from the positive half of the x-axis)
Similar: angle of inclination