• IPA: /ɪˈɹætɪk/


  1. unsteady, random; prone to unexpected changes; not consistent
    Henry has been getting erratic scores on his tests: 40% last week, but 98% this week.
  2. Deviating from normal opinions or actions; eccentric; odd.
    erratic conduct
Antonyms Translations Translations Noun

erratic (plural erratics)

  1. (geology) A rock moved from one location to another, usually by a glacier.
    • 2003, Bill Bryson, A Short History of Nearly Everything, BCA 2003, p. 372:
      The term for a displaced boulder is an erratic, but in the nineteenth century the expression seemed to apply more often to the theories than to the rocks.
  2. Anything that has erratic characteristics.
Synonyms Translations
  • German: Findling
  • Portuguese: bloco errático
  • Spanish: bloque errático

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