1 ~ (from sb/sth)
(a) [U] separating; state of being separate 分离; 分开; 隔开
*the separation of infectious patients from other patients 传染病人与其他病人之隔离
* Separation from his friends made him sad. 他离开了朋友, 十分难过.
(b) [C] instance or period of being separated 分离; 分开的期间
*after a separation of five years from his parents （他）离开父母五年以後.
2 [U, sing] legal arrangement by which a married couple live apart but do not end the marriage （有婚姻关系的双方按法律程序的）分居
(a) separation 决定按法律程序分居.
when something separates or is separate the separation of church and stateseparation between the zone of separation between the warring factions [U and C]
a period of time that two or more people spend apart from each other the separation of families during wartime[C]
a situation in which a husband and wife agree to live apart even though they are still married their separation and later divorce
1. His separation from his friends made him very sad. 他和朋友分别使他十分难受。
2. Separation anxiety was a malady she was intimately acquainted with. 分居焦虑是她深切体验到的一种心病。
3. She told me of my grandfather's devotion to his own children, and how difficult it was for him to send his daughter to America for her education, fearing that same separation (分离). 她给我讲了我外公对他自己的孩子的爱，对他来说送女儿去美国受教育有多困难！他害怕发生与他和他母亲一样的分离。
4. — Whether because of abandonment, separation, divorce or death of a spouse, marriages are dissolving with increasing frequency. ——不论是因为被遗弃、分居、离婚，还是因为配偶死亡，婚姻解体的频率都在上升。