leap : Idioms & Phrases

• noun the name of the day that is added during a leap year
  February 29; bissextile day.
  

WordNet

• verb be highly noticeable
  jump; jump out; stick out; stand out.
  
• verb jump out from a hiding place and surprise (someone)
  sally out; rush out; burst forth.
  
  • The attackers leapt out from the bushes

WordNet

• noun a second (as measured by an atomic clock) added to or subtracted from Greenwich Mean Time in order to compensate for slowing in the Earth's rotation
  

WordNet

• noun in the Gregorian calendar: any year divisible by 4 except centenary years divisible by 400
  intercalary year; bissextile year; 366 days.
  

WordNet

Leap" year`

Definitions

1. . Bissextile; a year containing 366 days; every fourth year which leaps over a day more than a common year, giving to February twenty-nine days. See Bissextile. ✍ Every year whose number is divisible by four without a remainder is a leap year, excepting the full centuries, which, to be leap years, must be divisible by 400 without a remainder. If not so divisible they are common years. 1900, therefore, is not a leap year.

Webster 1913

• noun a sudden large increase or advance
  quantum jump.
  
  • this may not insure success but it will represent a quantum leap from last summer

WordNet