Definition of breakpoints:
(n) :
(programming) A point in a program at which operation may be interrupted during debugging so that the state of the program at that point can be investigated.
(n) :
(web development) A viewport width at which a web page is programmed to adjust the properties (such as position, size, or visibility) of certain elements within the page.
(n) :
(meteorology) A location referred to when issuing watches, warnings, or advisories for specific areas.
(n) :
(physics) The point where surface water waves are breaking in, e.g., oceans or lakes.
(v) :
(programming, transitive) To flag with a breakpoint.