Definition: In mathematics, an "interlapse" is a set of points in which two or more quantities are equal. Interlapses can occur naturally, such as when two objects are moving toward each other at the same speed, or they may be caused by a system with no external influence. Interlapses can also refer to specific times in a day, where two or more events happen simultaneously. This type of interlude is often characterized by a sudden change in weather patterns, such as rain or