Definitions of leaning:

• noun:   the act of deviating from a vertical position
• noun:   an inclination to do something

  Example: "He felt leanings toward frivolity"

• noun:   a natural inclination
• noun:   the property possessed by a line or surface that departs from the vertical
• adjective:   resting against a support
• adjective:   departing or being caused to depart from the true vertical or horizontal

  Example: "The leaning tower of Pisa"