Is “Overrun” a Scrabble word?

1.An instance of overrunning

2.The amount by which something overruns

“At least this year's overrun isn't as unmanageable as last year!”

3.Air that is whipped into a frozen dessert to make it easier to serve and eat.

1.To defeat an enemy and invade in great numbers, seizing the enemy positions conclusively.

2.To infest, swarm over, flow over.

“The vine overran its trellis; the field is overrun with weeds.”

3.To run past; to run beyond.

“One line overruns another in length.”