to gradually come to an end or to stop for a period of time:
The conversation lapsed.
if a contract, agreement etc lapses, it comes to an end, usually because an agreed time limit has passed:
Your booking will automatically lapse unless you confirm it.
to stop believing in or following a religion:
those people who have lapsed from the practice of their religion
if a period of time lapses, it passes:
Many years had lapsed since her first visit to Wexford.
lapse into somethingphrasal verb
to go into a quiet or less active state:
He lapsed into a coma and died two days later.
Alison lapsed into puzzled silence.
to begin to behave or speak in a way that you did before:
She lapsed back into her old ways.
Occasionally he lapsed into his native German.
to get into a worse state or become worse:
Following his death, the Empire lapsed into chaos.
His poetry often lapses into sentimentality.