The meaning of AID is to provide with what is useful or necessary in achieving an end. How to use aid in a sentence.

Aid is often used to refer to help given in the form of food, money, medical supplies, etc., to a country or group of people that is in need or because of an emergency:

Aid is what you do when you help someone — you come to their aid. Rich countries provide economic aid to poor countries, and if you cut your hand, you'll be looking in the first aid kit for a Band-Aid.

Although the nouns aid and aide both have among their meanings “an assisting person,” the spelling aide is increasingly used for the sense “helper, assistant”: One of the senator's aides is calling.

1. to provide support for or relief to; help. 2. to promote the progress of; facilitate.

Something that provides help, support, or relief, such as money or supplies. Sent medical aid to the region after the storm.

The informal British expression What's (all) this/that in aid of? is used to ask about the purpose of something. “ What's all this rushing about in aid of, then?” [=what's all this rushing about for?] “We're …