double cross definition by Webster's New World
- Genetics a new hybrid produced by crossing two existing hybrids (A × B → AB, C × D → CD, AB × CD → ABCD)
- Informal a double-crossing; treachery
Informal to betray (a person) by doing the opposite of, or intentionally failing to do, what one has promised
Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio. Used by arrangement with John Wiley & Sons, Inc.
- double-crosser noun
double cross definition by American Heritage Dictionary
The American Heritage® Dictionary of the English Language, 4th edition Copyright © 2010 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
transitive verb dou·ble-crossed, dou·ble-cross·ing, dou·ble-cross·es
To betray by acting in contradiction to a prior agreement. See Synonyms at deceive.noun
- often double cross An act of betraying an ally, a friend, or an associate.
- double cross Genetics A cross in which each parent is the product of a single cross. It can be represented as AB ˣ CD, where A, B, C, and D are inbred lines.
- douˈble-crossˈer noun
double cross - Phrases/Idioms
A deliberate betrayal; violation of a promise or obligation, as in They had planned a double cross, intending to keep all of the money for themselves. This usage broadens the term's earlier sense in sports gambling, where it alluded to the duplicity of a contestant who breaks his word after illicitly promising to lose. Both usages gave rise to the verb double-cross. [Late 1800s]