Noun breakthrough has 3 senses
  1. discovery, breakthrough, find - a productive insight
    --1 is a kind of insight, brainstorm, brainwave
  2. breakthrough - making an important discovery
    --2 is a kind of
    discovery, find, uncovering
  3. breakthrough - a penetration of a barrier such as an enemy's defense
    --3 is a kind of
    penetration, incursion
    Derived form: verb break through2
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