American Heritage Dictionary
(5)
Century Dictionary
GNU Webster's 1913
(1)
WordNet
(4)
Elsewhere on the web
Developing countries have the potential to "leapfrog" the carbon-intensive development path of the 20th century and go straight to the advanced energy systems that are possible today.— Worldwatch Institute
"It's a lot like a leapfrog," Habib said, describing how he figures the pterosaurs got off the ground.— Yahoo! News: Top Stories
The result means Caley leapfrog St Mirren at the bottom of the table, although Gus MacPherson's side have a game in hand.— TEAMtalk Football News
An outright win over the boys in red was the only option for the Bermudans if they were to leapfrog over Cayman into the second qualifying space from Group C, so it came as little surprise that they pushed the envelope in attack.— Cayman Net News Daily Headlines

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