1. Having a quality that provokes disbelief
   "gave the teacher an implausible excuse" 
2. Highly imaginative but unlikely
   "an implausible explanation"
   - farfetched

See also: implausibleness, implausibly, improbable, incredible, unbelievable, unconvincing, unlikely

Antonym: plausible

• stagnant
• stagnant anoxia
• stagnant hypoxia
• stagnantly
• stagnate
• stagnation
• stagy
• staid
• staidly
• staidness
• stain
• stainability
• stainable
• stained
• stained glass
• stained-glass window
• hair grass
• hair grease
• hair mousse
• hair of the dog
• hair oil
• hair seal
• hair slide
• hair space
• hair spray