[no obj.]withdraw formally from membership of a federal union, an alliance, or a political or religious organization 正式退出,脱离 the kingdom of Belgium seceded from the Netherlands in 1830. 比利时王国于1830年正式退出尼德兰。
派生 seceder noun 语源
early 18th cent.: from Latin secedere, from se- 'apart' + cedere 'go'