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Noun: alarum  u'laa-rum or u'ler-um [N. Amer], u'laa-rum or u'la-rum [Brit]
Usage: archaic
  1. An automatic signal (usually a sound) warning of danger
    - alarm, alert, warning signal

Derived forms: alarums

Type of: sign, signal, signaling [N. Amer], signalling [Brit, Cdn]

Encyclopedia: Alarum