(aviation, with the) A dangerous sensory illusion where the pilot of an aircraft believes themself to be in a bank when they are actually wings-level, or vice-versa, often resulting in spatial disorientation and loss of control of the aircraft.

Third-person singular simple present indicative form of lean

Third-person singular simple present indicative form of lean into

Third-person singular simple present indicative form of lean in

plural of Lean

Third-person singular simple present indicative form of lean on

plural of leaning

Used other than figuratively or idiomatically: see lean, on. / (figuratively) To depend upon for support; to require assistance from.

A tendency or propensity.

simple past tense and past participle of lean