/rɪˈvɜ:sl ||; rɪˈvɝsḷ/noun [U] [C] the action of changing sth to the opposite of what it was before; an occasion when this happens 彻底的改变；逆转颠倒: The government insists that there will be no reversal of policy. 政府坚称不会彻底改变政策。The decision taken yesterday was a complete reversal of last week's decision. 昨天作出的决定与上星期的刚好相反。