From Longman Dictionary of Contemporary Englishtail off (also tail away British English) phrasal verb1 STOP HAPPENINGto 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. → tail→ See Verb table
