implausible Meaning, Definition & Usage

  1. adjective having a quality that provokes disbelief
    • gave the teacher an implausible excuse
  2. adjective satellite highly imaginative but unlikely
    farfetched.
    • a farfetched excuse
    • an implausible explanation

WordNet

Im*plau"si*ble adjective
Etymology
Pref. im- not + plausible: cf. F. implausible.
Definitions
  1. Not plausible; not wearing the appearance of truth or credibility, and not likely to be believed. "Implausible harangues." Swift. -- Im*plau"si*ble*ness, n. -- Im*plau"si*bly, adv.

Webster 1913