falsy
falsy adjective: evaluating to false in a Boolean context.
Adjective
falsy (not comparable)
- Evaluating to false in a Boolean context.
- In JavaScript, any expression or statement that expects a boolean value will work with a truthy or falsy value, so the fact that && does not always evaluate to true or false does not cause practical problems.2012, David Flanagan, JavaScript Pocket Reference, page 40
- However, in the second case, both '0' and the empty string () are falsy (in other words, they behave like false) and are therefore equal with respect to ==.2014, Basarat Syed, Beginning Node.js, →ISBN, page 33
- Antonyms:
- truthy
Antonyms of falsy
Forms of falsy
| alternative form | falsey |
|---|
Origin of falsy
From false + -y, to be an antonym to truthy.
Words formed from falsy
Questions about falsy
- What does falsy mean?
- Falsy means evaluating to false in a Boolean context.
- What part of speech is falsy?
- Falsy is an adjective.
Words near falsy in the dictionary
Source and license
Adapted from Wiktionary: falsy (page history and authors). Text available under the Creative Commons Attribution-ShareAlike 4.0 license. Word.ws reformatted the entry and added links. Wiktionary data of 2026-09-02.
Last updated:
Pronunciation audio from Wikimedia Commons, each file under its own free license: En-us-falsy.oga.
Cite this entry: “falsy.” Word.ws, https://word.ws/falsy. Based on Wiktionary, CC BY-SA 4.0.