(Marxism) All those things with the aid of which man acts upon the subject of his labor, and transforms it.

(idiomatic) Within an urban environment, a district or set of locales in which there is a high incidence of poverty, crime, disrepair, antisocial behavior, or other adverse conditions.

Mean solar time at the Greenwich Meridian.

Meaning that relies on self-reference in the text being understood.

the average length of a solar day, used for practical timekeeping

(mathematics, of a set of numbers or values) The square root of the arithmetic mean of the squares.

(physics) the average distance travelled between two similar events; especially by molecules in a gas or liquid, electrons or phonons in a crystal or neutrons in a moderator

Morally wrong actions are sometimes necessary to achieve morally right outcomes; actions can be considered morally right or wrong only by virtue of the morality of the outcome.

Alternative form of the end justifies the means

(mathematics) Any of various theorems that saliently concern mean values.