a game in which one child bends down and another leaps over
advancing as if in the child's game, by leaping over obstacles or competitors; "the company still believes the chip is a leapfrog in integration and will pay huge dividends"
progress by large jumps instead of small increments
the period of time that it takes for a planet (as, e.g., Earth or Mars) to make a complete revolution around the sun; "a Martian year takes 687 of our days"
a period of time containing 365 (or 366) days; "she is 4 years old"; "in the year 1920"
a period of time occupying a regular part of a calendar year that is used for some particular activity; "a school year"