What is Aid ?
Aid is (noun) 1. help aid to Third World countries aid worker 2. in aid of to help We give money in aid of the Red Cross. They are collecting money in aid of refugees. what’s all this in aid of? what’s all the fuss about? (informal.) 3. a device which helps He wears a hearing aid. Food processors are useful aids in the kitchen. to help someone or a process. Antonym thwart to aid and abet someone to help someone to commit a crime
source: Easier English, Student Dictionary Upper Intermediate Level