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Definition of buoy


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buoy  audio  (b, boi) KEY  

NOUN:
  1. A float moored in water to mark a location, warn of danger, or indicate a navigational channel.
  2. A life buoy.
TRANSITIVE VERB:
buoyed , buoy·ing , buoys
  1. To keep afloat or aloft: a glider buoyed by air currents.
    1. To maintain at a high level; support: "the persistent ... takeover speculation, which has buoyed up the shares of banks" (Financial Times).
    2. To hearten or inspire; uplift: "buoyed up by the team spirit and the pride of the older generation back at home" (Judith Martin).
  2. To mark with or as if with a buoy.

ETYMOLOGY:
Middle English boie, from Old French boue, probably of Germanic origin; see bh- 1 in Indo-European roots


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The American Heritage® Dictionary of the English Language, Fourth Edition.
Copyright © 2000 by Houghton Mifflin Company.
Published by the Houghton Mifflin Company. All rights reserved.
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