Definitions of lean:

• noun:   the property possessed by a line or surface that departs from the vertical
• verb:   to incline or bend from a vertical position

  Example: "She leaned over the banister"

• verb:   rely on for support

  Example: "We can lean on this man"

• verb:   cause to lean or incline

  Example: "He leaned his rifle against the wall"

• verb:   cause to lean to the side
• verb:   have a tendency or disposition to do or be something; be inclined
• adjective:   not profitable or prosperous

  Example: "A lean year"

• adjective:   lacking in mineral content or combustible material

  Example: "Lean ore"

• adjective:   low in mineral content

  Example: "A lean ore"

• adjective:   containing little excess

  Example: "A lean budget"

• adjective:   lacking excess flesh

  Example: "Yon Cassius has a lean and hungry look-Shakespeare"

• name:  A female given name (rare: 1 in 100000 females; popularity rank in the U.S.: #3628)
• name:  A surname (very rare: popularity rank in the U.S.: #30093)