1. ADJ If you describe something as ephemeral, you mean that it lasts only for a short time. 短暫的; 瞬間的[正式]

He talked about the country's ephemeral unity being shattered by the defeat. 他談到戰(zhàn)敗徹底粉碎了國(guó)家的短暫統(tǒng)一。