e ‧ lapse /ɪˈlæps/ BrE AmE verb [intransitive not in progressive]
[ Date: 1500-1600 ; Language: Latin ; Origin: elapsus , past participle of elabi 'to slip away' ]
formal if a particular period of time elapses, it passes:
Several months elapsed before his case was brought to trial.
The assignment must be completed within an overall elapsed time of one week.