1.
abounding in rocks or stones
rocky fields
2.
causing or characterized by jolts and irregular movements
3.
liable to rock
on high rocky heels
4.
full of hardship or trials
the rocky road to success
In July 1874, a swarm of Rocky Mountain locusts flew over Nebraska covering an area estimated at 198,600 square miles. It is estimated that the swarm contained about 12.5 trillion insects. These insects became extinct thirty years later.
