(countable) A device used to operate an appliance (such as a television, vehicle, or mechanical toy) from a short distance away. / (uncountable) A means of operating a device from a distance.

Voluntary control of the number of children conceived, especially by the planned use of contraception. / Any technique used to prevent the birth of a child (such as abortion or preventing conception).

A system designed to give assistance to aircraft, to prevent collisions and to manage aircraft flow.

Something given or offered that adds to a larger whole. / An amount of money given toward something. / The act of contributing.

The act of contravening a rule, regulation, or law, or of not fulfilling an obligation, promise, or agreement.

Arousing controversy—a debate or discussion of opposing opinions.

(law) in contrast, on the contrary

(uncountable) The degree of this difference. / (countable) A control on a television, etc, that adjusts the amount of contrast in the images being displayed.

(transitive) To set in opposition in order to show the difference or differences between. / (intransitive) To form a contrast.

That acts to prevent conception as a result of sexual intercourse.