The word used in that sentence means she is levelheaded/sensible. Grounded could also mean restricted in flight or movement; for example, a pilot forbidden to fly or a child prohibited by his parents from leaving his home, but that particular sentence does not express this meaning of the word.

Here, it means 'sensible' or 'aware' - has a good understanding of her surroundings and situations More context would help for questions like this.

Oh, tanks guy!!!

Here, it means 'sensible' or 'aware' - has a good understanding of her surroundings and situations More context would help for questions like this.