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An Upsweep

  1. An upward sweep or curve.
  2. (swimming) The upward motion of a swimmer's arm.Coordinate terms: downsweep, insweep, outsweep
  3. A hairstyle where most of the hair is fastened into place at the top of the head.
  4. (oceanography) The unidentified sound detected on the American NOAA's equatorial autonomous hydrophone arrays, consisting of a long train of narrow-band upsweeping sounds of several seconds in duration.