1. be greater in significance than;

   "the tragedy overshadowed the couple's happiness"
   

2. make appear small by comparison;

   "This year's debt dwarfs that of last year"
   

3. cast a shadow upon;

   "The tall tree overshadowed the house"
   

1.给…蒙上阴影；使扫兴
If an unpleasant event or feelingovershadows something, it makes it less happy or enjoyable.

e.g. Fears for the President's safety couldovershadow his peace-making mission...
对总统安全的担忧可能会给他的调解使命蒙上阴影。
e.g. Her childhood was overshadowed by her mother's incarceration in a psychiatric hospital.
她的母亲被关在精神病院，这给她的童年蒙上了阴影。

2.使黯然失色；使相形见绌；使显得无足轻重
If youare overshadowed by a person or thing, you are less successful, important, or impressive than they are.

e.g. Hester is overshadowed by her younger and more attractive sister.
赫斯特在她那年轻而且姿色更胜一筹的妹妹面前黯然失色。

3.（楼房、树木、大型建筑物等）遮蔽，遮挡
If one building, tree, or large structureovershadows another, it stands near it, is much taller than it, and casts a shadow over it.

e.g. He also designed one of the Edinburgh University towers that overshadows George Square...
他还设计了爱丁堡大学一座投影于乔治广场的塔楼。
e.g. She said stations should be in the open, near housing, not overshadowed by trees or walls.
她说车站应该建在住宅区附近的开阔地带，而不应为树木或墙壁所遮挡。

1. 使...相形见绌：17. disastrous灾难性的 | 18.overshadow使...相形见绌 | 20. usher in引领

2. 遮蔽,使......蒙上阴影：extensive 广泛的 |overshadow 遮蔽,使......蒙上阴影 | non-governmental sector 非政府部门,民间机构

3. 使......黯然失色：extensive 广泛的 |overshadow 使......黯然失色 | non-governmental sector 民间组织

Fears for the President's safety could overshadow his peace-making mission.

对总统安全的担忧可能会给他的调解使命蒙上阴影。

Her new book will overshadow all her earlier ones.

她的新书将会使她以前写的书都黯然失色.

Large oak trees overshadow the garden.

高大的栎树把花园遮得很暗.

There is a cloud on the horizon that may overshadow the talks.

隐隐透出的阴云可能为会谈投下阴影.

Economic political things overshadow even common sense occasionally.

经济政治上的东西有时候会让常识退避三舍.

Contemporary capitalism is a system in which the negative elements now overshadow the positive.

在当代资本主义系统中,消极因素湮没了进步因素.

The current AIDS pandemic tends to overshadow the continuing threat of other sexually transmitted infections.

当前爱滋病的广泛流行有一种遮蔽其他性传播疾病感染持续威胁的趋势.

• A stuffed ferret, whose death..had overshadowed..one Easter holiday.

  出自：E. Waugh