unwaveringly loyal or faithful; staunch; unchangingly true.

Origin of true-blue

First recorded in 1665–75

true blue


a nonfading blue dye or pigment.
a person who is true-blue.
(in the 17th century) the color adopted by the Covenanters in contradistinction to the royal red.

Origin of true blue

First recorded in 1665–75 Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for true-blue

Contemporary Examples of true-blue

Historical Examples of true-blue

  • He was not born on our soil, but he was a true-blue American for all that.

  • You're true-blue all through, without a streak of yellow in the whole of your composition.


    Cynthia Stockley

  • Rebel spy or true-blue loyalist, he is safe enough for the present.

  • If there is to-day a true-blue, a frank and out-spoken Democratic newspaper in the city of Boston, we do not know its name.

  • All things considered, he resolved to face the bovine thunderbolt with unflinching front, like a true-blue British tar!

    The Fugitives

    R.M. Ballantyne

British Dictionary definitions for true-blue



unwaveringly or staunchly loyal, esp to a person, a cause, etc

noun true blue

mainly British a staunch royalist or Conservative
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

Idioms and Phrases with true-blue

true blue

Loyal, faithful, as in You can count on her support; she's true blue. This expression alludes to the idea of blue being the color of constancy, but the exact allusion is disputed. One theory holds it alludes to the unchanging blue sky, another to the fastness of a blue dye that will not run. Blue has been the identifying color of various factions in history. In the mid-1600s the Scottish Covenanters, who pledged to uphold Presbyterianism, were called true blue (as opposed to red, the color of the royalists). In the 1800s the same term came to mean “staunchly Tory,” and in America, “politically sound.”

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