overlay - definition and synonyms

verb [transitive] [usually passive] 

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present tense
present participleoverlaying
past tenseoverlaid
past participleoverlaid
  1. 1
    to cover the surface of something with a thin layer of a substance, especially for decoration
    1. a.
      to put one thing on top of another, so that they both show

      software that lets you overlay graphics with text

  2. 2
    if a sound, taste, smell, or feeling is overlaid with another one, enough of the other one is added to be noticeable