Vest in Definition 1 of 3Pro Tip 1/3Authority Implication Indicates someone being officially granted control or power in an organization or group. The final approval is vested in the committee. Pro Tip 2/3Implicit Trust Suggests a high level of trust placed in the person or group being vested with power. The community's trust is vested in the local council. Pro Tip 3/3Not Transferable Power vested in a person or group is typically non-transferable, unless specified. Leadership is vested in her, she can't just delegate it.