Having a base, nasty, petty, or malevolent disposition.

(statistics) Given a random sample mathbf x₁,…, mathbf x_N from an n-dimensional random variable mathbf X, a mean defined as

An average calculated after biasing values according to agreed weightings.

The situation in which a word or phrase has two different, often opposite, meanings. For example, wicked can mean both "good" and "bad".

(colloquial) efficient because of having nothing in excess of what is needed, and single-minded in one's objective

plural of no mean feat

(litotes) A laudable triumph of great difficulty; no small feat.

The mean (average) of all numbers observed, rather than that of a subsample.

Alternative form of in the meantime

The geometric mean.