Definition of "Aid" :

noun: the work of providing treatment for or attending to someone or something

noun: the activity of contributing to the fulfillment of a need or furtherance of an effort or purpose

"Rescue party went to their aid."

noun: a person or thing that is a resource that helps make something easier or possible to do

"Visual aids in teaching."

noun: gift of money or other material help to support a person or cause

verb: improve the condition of

verb: give help or assistance; be of service