Proxy/ˈprɑːksi/ Definition 1 of 3Pro Tip 1/3Human Replacement Used when someone acts on another's behalf, often in meetings or voting. Sara attended as Jack's proxy when he couldn't make it. Pro Tip 2/3Not Always Present A proxy doesn't need to be present to represent another person's actions or rights. He cast a vote through a proxy without attending the assembly. Pro Tip 3/3Authority Given The proxy has the authority to act as if they were the person they're representing. As her proxy, I signed the contract on her behalf.