When someone survives, they continue to live even after a dangerous event or a difficult situation.
Surviving is usually a very good thing because it means you didn't get hurt or die.
Examples:
The little plant survives even though it doesn't get much water.
She survives the big storm.
He survives the scary movie without hiding.
The tiny bug survives the big shoe.
The old car survives many winters.
The small bird survives the long trip.