inclination

noun

• 1a person’s natural tendency or urge to act or feel in a particular way; a disposition or propensity:John was a scientist by training and inclination he was free to follow his inclinations
• (inclination for/to/toward) an interest in or liking for (something):Burger King and Wendy’s didn’t show any inclination to jump into a price war with McDonald’s

• 2a slope or slant:changes in inclination of the line on the graph
• a bending of the body or head in a bow:the questioner’s inclination of his head
• the dip of a magnetic needle.

• 3the angle at which a straight line or plane is inclined to another.
• Astronomy the angle between the orbital plane of a planet, comet, etc., and the ecliptic, or between the orbital plane of a satellite and the equatorial plane of its primary.
• Astronomy the angle between the axis of an astronomical object and a fixed reference angle.