D defs.my
Entry 2 senses Webster, 1913

Earldom

/ẽrl'-dəm/ · Earl·dom · IPA /ˈəɹldəm/
01 n. The jurisdiction of an earl; the territorial possessions of an earl.
  1. 1.
    The jurisdiction of an earl; the territorial possessions of an earl.
  2. 2.
    The status, title, or dignity of an earl.
    “He [Pulteney] shrunk into insignificancy and an earldom.” — Chesterfield.