Lean1  —v. (past and past part. Leaned or leant) 1 (often foll. By across, back, over, etc.) Be or place in a sloping position; incline from the perpendicular. 2 (foll. By against, on, upon) (cause to) rest for support against etc. 3 (foll. By on, upon) rely on. 4 (foll. By to, towards) be inclined or partial to. —n. Deviation from the perpendicular; inclination.  lean on colloq. Put pressure on (a person) to act in a certain way. Lean over backwards see *backwards. [old english]