birth rateBrE /ˈbɜːθ reɪt/ 🔊NAmE /ˈbɜːrθ reɪt/ 🔊 nounthe number of births every year for every 1 000 people in the population of a place 出生率（某地区每年每 1 000 人中的出生数目）◆a low/high birth rate 低／高出生率