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heads or tails
noun
- a gambling game in which a coin is tossed, the winner being the player who guesses which side of the coin will face up when it lands or is caught.
- the tossing of a coin in this manner to determine a question or choice.
Word History and Origins
Origin of heads or tails1
Idioms and Phrases
An expression used when tossing a coin to decide between two alternatives, as in Let's just flip a coin to decide who pays—do you want heads or tails? Each person involved chooses a different side of the coin, either “heads” or “tails,” and whichever side lands facing up is considered the winner. This usage, dating from the late 1600s, is sometimes turned into Heads I win, tails you lose , meaning “I win no matter what,” which probably originated in an attempt to deceive someone. [Mid-1800s]Example Sentences
Whether that falls heads or tails, though, generative AI isn't going to be what kills the arts and humanities.
Let’s start by considering our hypothetical quantum system that can, when observed, come up either heads or tails.
Imagine a physicist observing a quantum system whose behavior is akin to a coin toss: it could come up heads or tails.
Whatever the outcome—heads or tails in our example—it shall hold for all observers.
Measuring the wave function, however, causes it to collapse, mathematically speaking, such that the system in our example shows up as either heads or tails.
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Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
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