Pronunciation: (tel'tāl"), [key]
1. a person who heedlessly or maliciously reveals private or confidential matters; tattler; talebearer.
2. a thing serving to reveal or disclose something.
3. any of various indicating or registering devices, as a time clock.
4. Music.a gauge on an organ for indicating the air pressure.
5. an indicator showing the position of a ship's rudder.
6. a row of strips hung over a track to warn train crew members on freight trains that a low bridge, tunnel, or the like is approaching.
7. Yachting.(on a sailboat) a feather, string, or similar device, often attached to the port and starboard shrouds and to the backstay, to indicate the relative direction of the wind.
8. Squash.a narrow piece of metal across the front wall of a court, parallel to and extending 17 inches (43.2 cm) above the base: a ball striking this is an out.

1. that reveals or betrays what is not intended to be known: a telltale blush.
2. giving notice or warning of something, as a mechanical device.

Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.

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