D defs.my
Entry 5 senses Webster, 1913

Retainer

/rĭt-ān'-ẽr/ · Re·tain·er · IPA /ɹɪˈteɪn.ɚ/
01 n. One who, or that which, retains.
  1. 1.
    One who, or that which, retains.
  2. 2.
    One who is retained or kept in service; an attendant; an adherent; a hanger-on.
  3. 3.
    Hence, a servant, not a domestic, but occasionally attending and wearing his master's livery.
  4. 4.
    The act of a client by which he engages a lawyer or counselor to manage his cause.(Law)
  5. 5.
    The act of keeping dependents, or the state of being in dependence.