Noun asylum has 2 senses
  1. refuge, sanctuary, asylum - a shelter from danger or hardship
    --1 is a kind of shelter
    --1 has particulars: harbor, harbour; safehold; safe house
  2. mental hospital, psychiatric hospital, mental institution, institution, mental home, insane asylum, asylum - a hospital for mentally incompetent or unbalanced person
    --2 is a kind of hospital, infirmary
    --2 has particulars:
     Bedlam, booby hatch, crazy house, cuckoo's nest, funny farm, funny house, loony bin, madhouse, nut house, nuthouse, sanatorium, snake pit