One who, or that which, retains.
- One that retains, as a device, frame, or groove that restrains or guides.
- Dentistry An appliance used to hold teeth in position after orthodontic treatment.
- An employee, typically a long-term employee.
- A servant or an attendant, especially one in the household of a person of high rank.
- The act of engaging the services of a professional adviser, such as an attorney, counselor, or consultant.
- The fee paid to retain a professional adviser.