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Phrases. 1  be of assistance. 2  Be of practical use or help. âthe guide will be of assistance to development groupsâ. ââWe hope this small fund and material aid will be of assistance to the victims,â a press release stated.â.
Princeton's WordNet(4.25 / 4 votes)Rate this definition: 1  support(noun) the activity of providing for or maintaining by supplying with money or necessities. his support kept the family together; they gave him emotional support during difficult times. 2  support(noun) aiding the cause or policy or interests of.