Definition of necessity :
1. That which is necessary; a necessary; a requisite; something indispensable; - often in the plural.
2. That which makes an act or an event unavoidable; irresistible force; overruling power; compulsion, physical or moral; fate; fatality.
3. The condition of being needy or necessitous; pressing need; indigence; want.
4. The negation of freedom in voluntary action; the subjection of all phenomena, whether material or spiritual, to inevitable causation; necessitarianism.
5. The quality or state of being necessary, unavoidable, or absolutely requisite; inevitableness; indispensableness.
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obligation (part of speech: noun)
requirement (part of speech: noun)
- The " necessity" is, not that He should have something to offer now, and to- morrow, and always, but that the matter and act of offering should belong to Him. - "Messages from the Epistle to the Hebrews", Handley C.G. Moule.
- He warned them of the absolute necessity to make a last effort for freedom. - "The Rise of the Dutch Republic, Volume II.(of III) 1566-74", John Lothrop Motley Last Updated: January 25, 2009.
- He seemed, after a long silence, to accept her sense of necessity as sufficient reason. - "Amabel Channice", Anne Douglas Sedgwick.