Noun old line state has 1 sense
  1. Maryland, Old Line State, Free State, MD - a Mid-Atlantic state; one of the original 13 colonies
    --1 is a kind of American state
    --1 is a part of Mid-Atlantic states
    --1 has parts:
     Aberdeen; Annapolis, capital of Maryland; Baltimore; Fort Meade, Fort George Gordon Meade, Fort George G. Meade; Frederick; Hagerstown; Chesapeake Bay; Potomac, Potomac River; Susquehanna, Susquehanna River
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