plural of qualitative leap

Third-person singular simple present indicative form of leap for joy

Third-person singular simple present indicative form of leap through hoops

A year in the Julian or Gregorian calendars with an intercalary day added to February, used to adjust for the extra hours of the solar year; a 366-day year.

(quantum mechanics) The discontinuous change of the state of an electron in an atom or molecule from one energy level to another. / (figuratively) An abrupt, extreme change.

An extra day intercalated into a year, especially the day intercalated into the Julian calendar every fourth year and into the Gregorian calendar every fourth year excepting centuries not divisible by 400, usually reckoned as February 29th.

A second of time added to the year occasionally to compensate for variation in the rate of Earth's rotation relative to the absolute standards of time.

plural of leap year

Alternative form of leapfrog.

(figuratively) The act of believing in something despite lack of proof of its truth or existence, or the attempt of something without being sure of its possible outcome.