Definition: to be so overwhelmed by emotion as to have no control; to be unable to do anything else.
E.g. "The woman broke down when the police told her that her son had died."
Gloss: /\IX1 WOMAN/\, POLICE INFORM-ix1, POSS-ix1 SON RECENTLY DIE, IX1 SHOCK MIND-BREAKDOWN.
English equivalent: The woman broke down when the police told her that her son had died.
Watch closely for gaze-shifting used in this sentence, spatial agreement (subject, object, and verb), non-manual signals (e.g. "CS" mouth morpheme for 'recently'.