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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.
aid-the work of providing treatment for or attending to someone or something; no medical care was required; the old car needs constant attention. care, tending, attention. hair care, haircare, hairdressing-care for the hair: the activity of washing or cutting or curling or arranging the hair.