ground
US /ɡraʊnd/
UK /ɡraʊnd/

1.
2.
3.
reason or justification for something
:
•
There is no ground for complaint.
•
His argument had no factual ground.
1.
to prevent (a pilot or an aircraft) from flying
:
•
The bad weather grounded all flights.
•
The airline grounded the entire fleet for safety checks.
2.
3.
1.
having a good understanding of basic facts and principles; sensible and realistic
:
•
She's a very grounded person, always calm and practical.
•
Despite his success, he remained humble and grounded.