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  1. simple past tense and past participle of unthink.
  1. not thought; not framed in a thought or thoughts: an unthought advantage.
  2. not expected; not anticipated (often followed by of): an unthought-of place to find the key.

Origin of unthought1

1530–40; (defs 2, 3) un-1 + thought2


  1. an absence of thought.

Origin of unthought2

First recorded in 1865–70; un-1 + thought1


verb (used without object), un·thought, un·think·ing.
  1. to end one's thought or reverse the process of thought.
verb (used with object), un·thought, un·think·ing.
  1. to dispel from the mind: Unthink your thoughts.

Origin of unthink

First recorded in 1590–1600; un-2 + think1
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for unthought

Historical Examples

  • Night was as day at such times, and meals were unthought of.

    A Breath of Prairie and other stories

    Will Lillibridge

  • All this is a later development, unthought of when our artist friend was with us.

    Lotus Buds

    Amy Carmichael

  • Of relaxation there was little, and recreation was unthought of.

  • Forgive the transports of a blessing so unexpected, so unhoped for, so unthought of!

  • In other sections, to withhold the sacraments for such a cause is unthought of.

British Dictionary definitions for unthought


verb -thinks, -thinking or -thought (tr)
  1. to reverse one's opinion about
  2. to dispel from the mind
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012