An act or attempt without any idea about what the result will be.

(idiomatic) Dramatic improvements.

(idiomatic) Considerably; significantly.

In the calendar reform, a week added to usual 52, such that every year starts on the same day

In the Jewish calendar or other lunisolar calendars, an extra month added to the usual 12 months because the solar year is slightly longer than 12 lunar months.

A nickname for a vehicle. / A nickname for someone or something that leaps. / The name given to a 1954 Cold War hero pigeon.

plural of leap of faith

plural of leap-frog (alternative form of leapfrogs).

present participle of leap-frog.

simple past tense and past participle of leap-frog.