inclinationn.[L. inclinatio: cf. F. inclination.]()1. The act of inclining, or state of being inclined; a leaning; as, an inclination of the head.()2. A direction or tendency from the true vertical or horizontal direction; as, the inclination of a column, or of a road bed.()3. A tendency towards another body or point.()4. (Geom.) The angle made by two lines or planes; as, the inclination of the plane of the earth's equator to the plane of the ecliptic is about 23 28'; the inclination of two rays of light.()5. A leaning or tendency of the mind, feelings, preferences, or will; propensity; a disposition more favorable to one thing than to another; favor; desire; love.()A mere inclination to a thing is not properly a willing of that thing. (South.)How dost thou find the inclination of the people? (Shak.)6. A person or thing loved or admired.(Sir W. Temple.)7. (Pharm.) Decantation, or tipping for pouring.()Inclination compass, an inclinometer. -- Inclination of an orbit (Astron.), the angle which the orbit makes with the ecliptic. -- Inclination of the needle. See Dip of the needle, under Dip.()()