Retainer

Retainer may refer to:
 * Retainer (orthodontics), devices for teeth
 * RFA Retainer (A329), a ship
 * Retainers in early China, a social group in early China

Employment

 * Retainer agreement, a contract in which an employer pays in advance for work, to be secured or specified later, when required
 * Domestic worker or servant, especially one who has been with one family for a long time (chiefly British English)
 * Affinity (medieval), also Retinue, a person or group gathered around in the service of a lord