(uncountable) Meat with no fat on it. / (countable, biology) An organism that is lean in stature.

To thin out (a fuel-air mixture): to reduce the fuel flow into the mixture so that there is more air or oxygen.

To conceal.

(slang, US) A recreational drug based on codeine-laced promethazine cough syrup, especially popular in the hip hop community in the southeastern United States.

A shelter with a sloped roof; also a building with a similar construction attached to the side of a building as an extension.

The property of being lean, without excess or fat.

Third-person singular simple present indicative form of lean

(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.

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

Obsolete form of lean.