1. well-grounded - Adjective
2. well-grounded - Adjective Satellite
logically valid
Source: WordNetwell grounded
a sound argument Source: Internet
That is why, of the two tales, A Quiet Place is not just more enjoyable but, alien invaders notwithstanding, more coherently plausible, revelling in the logic of well-grounded terror. Source: Internet
The flashbacks take us across time from the Saxon saints to World War II to the present, and offer well-grounded historical details. Source: Internet