leap·frog / ˈlēpˌfrôg; -ˌfräg/ • n. a game in which players in turn vault with parted legs over the backs of others who are bending down.• v. (-frogged, -frog·ging) [intr.] perform such a vault: they leapfrogged around the courtyard. ∎ (of a person or group) surpass or overtake another to move into a leading or dominant position: she leapfrogged into a sales position. ∎ [tr.] pass over (a stage or obstacle): attempts to leapfrog the barriers of class.