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3 definitions found
 for lossy
From WordNet (r) 3.0 (2006) :

      adj 1: characterized by or causing dissipation of energy [ant:

From The Jargon File (version 4.4.7, 29 Dec 2003) :

      1. Said of people, this indicates a poor memory, usually short-term. This
      usage is analogical to the same term applied to data compression and
      analysis. ?He's very lossy.? means that you can't rely on him to accurately
      remember recent experiences or conversations, or requests. Not to be
      confused with a ?loser?, which is a person who is in a continual state of
      lossiness, as in sense 2 (see below).
      2. Said of an attitude or a situation, this indicates a general downturn in
      emotions, lack of success in attempted endeavors, etc. Eg, ?I'm having a
      lossy day today.? means that the speaker has ?lost? or is ?losing? in all
      of their activities, and that this is causing some increase in negative

From The Free On-line Dictionary of Computing (30 December 2018) :

      A term describing a data compression algorithm
     which actually reduces the amount of information in the data,
     rather than just the number of bits used to represent that
     information.  The lost information is usually removed because
     it is subjectively less important to the quality of the data
     (usually an image or sound) or because it can be recovered
     reasonably by interpolation from the remaining data.
     MPEG and JPEG are examples of lossy compression
     Opposite: lossless.

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