Need
Part of speech: noun
Definition: Something required.
Part of speech: verb
Definition: To have an absolute requirement for. To want strongly; to feel that one must have something. To be obliged or required to.
Example sentence: A bank is a place that will lend you money if you can prove that you don't need it.
Demand
Part of speech: verb
Definition: To request forcefully.To claim a right to something.To ask forcefully for information.To require of someone.To issue a summons to court.
Part of speech: noun
Definition: The desire to purchase goods and services.The amount of a good or service that a consumer is willing to buy at a particular price.A need.A claim for something.A requirement.An urgent request.An order.(electric) the measure of the maximum power load of a utility's customer over a short period of time; the power load integrated over a specified time interval.
Example sentence: The health of the eye seems to demand a horizon. We are never tired, so long as we can see far enough.