catalyst - definition and synonyms

noun [countable] 

Your browser doesn’t support HTML5 audio

  1. 1
    someone or something that causes something to happen or change
    catalyst for:

    The new development will act as a catalyst for growth in business and tourism.

     Synonyms and related words
  2. 2
    chemistry a substance that causes a chemical reaction to happen more quickly but is not affected itself. An enzyme is a type of catalyst.