(mathematics) The branch of pure mathematics concerned with the properties of integers.

(mathematics) A complex number consisting of more than two square roots of negative one, creating multiple simulated dimensions.

(idiomatic) Some period of time, such as a term of employment or a lifetime, is coming to an end.

Indefinitely large numerically, many.

(quantum mechanics) One of certain integers or half-integers that specify the state of a quantum mechanical system (such as an electron in an atom).

A number written in the form a × bᶜ, e.g. 3.75 × 10³ (a being the mantissa, b, the base and c, the exponent).

A mandatory unique alphanumeric code (usually 17 characters long) assigned to each vehicle produced, stamped into the metal on the dashboard on the left-hand side (viewable through the windshield), and on the engine block and at least one other place somewhere on the body of the vehicle.

(derogatory) A dunce, mentally dull or stupid person. / (derogatory) A person who refuses to learn or grow mentally.

(physics, chemistry) The total number of protons and neutrons in an atomic nucleus. Symbol: A

The Book of Numbers, the fourth of the Books of Moses in the Old Testament of the Bible, the fourth book in the Torah.