warn or arouse to a sense of danger or call to a state of preparedness; "The empty house alarmed him"; "We alerted the new neighbors to the high rate of burglaries"
fill with apprehension or alarm; cause to be unpleasantly surprised; "I was horrified at the thought of being late for my interview"; "The news of the executions horrified us"
a device that signals the occurrence of some undesirable event
a clock that wakes a sleeper at some preset time
an automatic signal (usually a sound) warning of danger
fear resulting from the awareness of danger
a high pommel of a Western saddle (usually metal covered with leather)
a noisemaker (as at parties or games) that makes a loud noise when you blow through it
a device having the shape of a horn; "horns at the ends of a new moon"; "the hornof an anvil"; "the cleat had two horns"
a noise made by the driver of an automobile to give warning;
the material (mostly keratin) that covers the horns of ungulates and forms hooves and claws and nails
stab or pierce with a horn or tusk; "the rhino horned the explorer"
one of the bony outgrowths on the heads of certain ungulates
any hard protuberance from the head of an organism that is similar to or suggestive of a horn
a device on an automobile for making a warning noise
a brass musical instrument with a brilliant tone; has a narrow tube and a flared bell and is played by means of valves
a brass musical instrument consisting of a conical tube that is
eellike aquatic North American salamander with small forelimbs and no hind limbs; have permanent external gills
an acoustic device producing a loud often wailing sound as a signal or warning
a warning signal that is a loud wailing sound
a woman who is considered to be dangerously seductive
a sea nymph (part woman and part bird) supposed to lure sailors to destruction on the rocks where the nymphs lived; "Odysseus ordered his crew to plug their ears so they would not hear the Siren's fatal song"