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Definition of 'alum'

You searched for alums

Noun

  1. a white crystalline double sulfate of aluminum: the ammonium double sulfate of aluminum
       Synonyms: ammonia alum ammonium alum
  2. a white crystalline double sulfate of aluminum: the potassium double sulfate of aluminum
       Synonyms: potassium alum potash alum
  3. a person who has received a degree from a school (high school or college or university)
       Synonyms: alumnus alumna graduate grad
  4. a double sulphate of aluminum and potassium that is used as an astringent (among other things)


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