noun.
[capitalized] The hospital of St. Mary of Bethlehem in London, originally a priory, founded about 1247, but afterward used as an asylum for lunatics.
noun.
Hence A madhouse; a lunatic asylum.
noun.
A scene of wild uproar and confusion.
noun.
An inmate or a patient of Bethlehem Hospital, or Bedlam; specifically, one discharged as cured (though often only partially cured) and licensed to beg.
noun.
Hence In general, a madman; a lunatic.
Belonging to or fit for a bedlam or madhouse; mad; mentally deranged.