Meaning : Advancing as if in the child's game, by leaping over obstacles or competitors.
Example :
The company still believes the chip is a leapfrog in integration and will pay huge dividends.
Meaning : A game in which one child bends down and another leaps over.
Meaning : Jump across.
Example :
He leapfrogged his classmates.
Meaning : Progress by large jumps instead of small increments.