a large road vehicle, usually consisting of a two or three-axled chassis, and fitted with a cab, engine and drivetrain, used for hauling semitrailers.

(humorous, nonstandard) The United Kingdom, when ruled by a queen rather than a king.

(mathematics) a completely multiplicative function on the positive integers that is defined as equal to one for a special value and zero otherwise:

plural of unit function

The amount of urotoxin necessary to kill an animal weighing one kilogram.

(slang) A stupid person; an idiot / The average distance between the centres of the Earth and the Moon; lunar distance

Any of the twenty-six states or the federal district of Brazil.

(manufacturing) A combination of items that is used as the basis for computing costs and materials needs. A complete construction can consist of multiple construction units, each of which is a copy of the others.

(UK) 10 millilitres of pure alcohol contained within a beverage.

A unit of speed (abbreviated B) equal to one meter per 1,000,000 years, used in geology to measure rates of lowering of earth surfaces due to erosion.