tail off (
also tail away British English)
phrasal verb (
see also tail)
1. to become gradually less, smaller etc, and often stop or disappear completely:
Profits tailed off towards the end of the year.2. written if someone’s voice tails off, it becomes quieter and then stops:
‘I didn’t mean ...’ Her voice tailed off in embarrassment. [TahlilGaran] Dictionary of Contemporary English ▲