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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.
Learner's definition of AID. : to provide what is useful or necessary : help. [+ object] They gave money in order to aid the cause. She aided them in their efforts. He jumped into the water to aid the drowning child. His position was aided [=strengthened] by the fact that he was right.