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