alum - definitions and synonyms

alum noun

  1. English Meaning: 

    : a white crystalline double sulfate of aluminum: the ammonium double sulfate of aluminum

  2. English Meaning: 

    : a white crystalline double sulfate of aluminum: the potassium double sulfate of aluminum

  3. English Meaning: 

    : a person who has received a degree from a school (high school or college or university)

    Synonyms:

    alumna / alumnus / grad / graduate
  4. English Meaning: 

    : a double sulphate of aluminum and potassium that is used as an astringent (among other things)