In aid of something/somebody Definition 1 of 2Pro Tip 1/3Charitable Context Often used for charity or fundraising events and efforts. Celebrities performed in aid of the flood relief fund. Pro Tip 2/3Non-Financial Support The phrase doesn't only imply financial help, but any form of support. Volunteers worked tirelessly in aid of the displaced families. Pro Tip 3/3Helping Individuals It can be used to describe help provided directly to individuals. The fundraiser was held in aid of the injured firefighter.