(meteorology) A location referred to when issuing watches, warnings, or advisories for specific areas.
(physics) The point where surface water waves are breaking in, e.g., oceans or lakes.
(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.
(web development) A particular size at which a web page is designed to switch to a different layout.
verb
(programming, transitive) To flag with a breakpoint.