A condition or situation in which something must be supplied in order for a certain condition to be maintained or a desired state to be achieved, The lack of something that is necessary or important; urgent want; necessity, A state that requires supply or relief; pressing occasion for something; necessity; urgent want, adverb_ obsolete Of necessity. See needs, verb_ have or feel a need for, require as useful, just, or proper, have need of, transitive verb_ To be in want of; to have cause or occasion for; to lack; to require, as supply or relief, To have an absolute requirement for, intransitive verb_ To have an obligation (to do something), To be under the necessity of or the obligation to, To be subject (to an action) by obligation