Truthy

//ˈtɹuːθi// adj, slang

adj, slang ·Moderate ·College level

Definitions

Adjective
  1. 1
    Faithful; true. humorous, obsolete

    "You […] are afraid Theodore your sweetheart shouldn't prove truthy."

  2. 2
    Only superficially true; that is asserted or felt instinctively to be true, with no recourse to facts. US, colloquial

    "Historians today point out that each of these ringing assertions was, at best, truthy."

  3. 3
    Evaluating to true 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."

Synonyms

All synonyms
faithfulfaithfulhonesttruthfultruthliketruthlike

Antonyms

All antonyms
falsy

Example

More examples

"I don't know if it's true, but it's definitely truthy."

Etymology

From truth + -y. In colloquial sense, back-formation from truthiness.

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Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.