(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.

Alternative spelling of leaping house

(obsolete) A brothel.

plural of leap day

plural of leap second

(idiomatic) Dramatic improvements.

(idiomatic) Considerably; significantly.

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

(idiomatic) To appear suddenly in one's thoughts.

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