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

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

To conceal.

simple past tense and past participle of lean

(of an object taller than its width and depth) An inclination away from the vertical.

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

(of a person or animal) Slim; not fleshy. / (of meat) Having little fat. / Having little extra or little to spare; scanty; meagre.

To incline, deviate, or bend, from a vertical position; to be in a position thus inclining or deviating. / (copulative) To incline in opinion or desire; to conform in conduct; often with to, toward, etc.

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

A tendency or propensity.