Dictionary.com
definitions
  • synonyms

qt.

  1. quantity.
  2. plural qt., qts. quart.
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q.t.

or Q.T.

Informal.
  1. quiet.
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Idioms
  1. on the q.t., stealthily; secretly: to meet someone on the q.t.
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Origin of q.t.

First recorded in 1905–10
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Related Words

hiddenundercoversurreptitioussecludedlatentmysteriouscovertundisclosedunknownprivatedarkundergroundconcealedclandestineinvisibleobscureburiedsecretprivyoccult

Examples from the Web for qt

Historical Examples

  • The heater when connected to a current supply and placed in 1 qt.

    The Boy Mechanic, Book 2

    Various

  • This therefore measures the area generated by the motion of QT.

  • I was only about as upset as that spilled milk that was cried over and no wonder at 18 cents a qt.

    Believe You Me!

    Nina Wilcox Putnam

  • A very effective dip for brass and copper articles, that will leave a clean and bright finish, is 2 qt.

  • Stops, A, are placed in the casing at the right places for each pocket to spill when exactly 2 qt.

British Dictionary definitions for qt

qt

abbreviation for plural qt or qts
  1. quart
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q.t.

abbreviation for informal
  1. quiet
  2. on the q.t. secretly
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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

Word Origin and History for qt

q.t.

n.

slang for "quiet," in phrase on the q.t., attested from 1874. Phrase on the quiet appears from 1847.

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Online Etymology Dictionary, © 2010 Douglas Harper
qt in Medicine

qt

abbr.
  1. quart
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The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
qt in Science

qt.

  1. Abbreviation of quart
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The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

Idioms and Phrases with qt

Q.T.

see on the Q.T.

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The American Heritage® Idioms Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.