plausibility

Something's plausibility is how likely it is to be true. You might, for example, question the plausibility of your brother's story about seeing a UFO land in the back yard.

The noun plausibility means "likelihood" or "believability." You're most likely to come across the word in a negative or questioning context, as when someone doubts the plausibility of an action movie's plot or questions the plausibility of a debater's claims and arguments. If you aren't sure you believe something, you'll question its plausibility. The Latin root is plausibilis, "deserving applause or acceptable."

Definitions of plausibility
  1. noun
    apparent validity
    synonyms: plausibleness
    see moresee less
    Antonyms:
    implausibility, implausibleness
    the quality of provoking disbelief
    types:
    reasonableness, tenability, tenableness
    the quality of being plausible or acceptable to a reasonable person
    type of:
    believability, credibility, credibleness
    the quality of being believable or trustworthy
Word Family
EDITOR’S CHOICE

Test prep from the experts

Boost your test score with programs developed by Vocabulary.com’s experts.

  • Proven methods: Learn faster, remember longer with our scientific approach.
  • Personalized plan: We customize your experience to maximize your learning.
  • Strategic studying: Focus on the words that are most crucial for success.

SAT/PSAT

$29.95
  • Number of words: 500+
  • Duration: 8 weeks or less
  • Time: 1 hour / week

TOEFL

$29.95
  • Number of words: 500+
  • Duration: 10 weeks or less
  • Time: 1 hour / week

ACT

$29.95
  • Number of words: 700+
  • Duration: 10 weeks
  • Time: 1 hour / week