noun

1. the act of bending, leaning, or sloping; esp., a bowing or nodding
2. an inclined surface or plane; slope; incline; slant
3. the extent or degree of incline from a horizontal or vertical position, course, etc.
4. the difference in direction of two lines, planes, or surfaces as measured by the angle between them; specif., a property of a line in a plane, being the angle measured from the positive portion of the x-axis to the line in question
5. 1. a particular disposition or bent of mind; bias; tendency an inclination to talk
   2. a liking or preference
6. any action, practice, or thing, toward which one is inclined

Etymology: OFr < L inclinatio < pp. of inclinare, incline