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erratic

From Wiktionary, the free dictionary

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See also: erràtic

English

WOTD – 13 August 2012, 13 August 2013, 13 August 2014

Alternative forms

Etymology

From Middle English erratik, erratyk, from Latin errāticus; compare Old French erratique.

Pronunciation

Adjective

erratic (comparative more erratic, superlative most erratic)

  1. Unsteady, random; prone to unexpected changes; not consistent.
    Synonym: mercurial
    Henry has been getting erratic scores on his tests: 40% last week, but 98% this week.
    • 2010, Mary Roach, “You Go First: The Alarming Prospect of Life Without Gravity”, in Packing for Mars: The Curious Science of Life in the Void, W. W. Norton & Company, →ISBN, page 90:
      The V-2's directional system was notoriously erratic. In May 1947, a V-2 launched from White Sands Proving Ground headed south instead of north, missing downtown Juarez, Mexico, by 3 miles.
  2. Deviating from normal opinions or actions; eccentric; odd.
    erratic conduct

Antonyms

Derived terms

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, page 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.
    • 2015 May 4, Dominick Tyler, “10 UK landscape features that you’ve probably never heard of”, in The Guardian‎:
      During the last ice-age, massive stones were carried for miles by the scouring glaciers, only to be left, like passengers at the end of the line, when the glaciers retreated. Stranded in their new surroundings with rocks with which they share no common geology, their out-of-place-ness is evoked by their name: “erratics”.
  2. Anything that has erratic characteristics.

Synonyms

Translations

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