[C,U] the crime of physically attacking someone

侵犯他人身体，侵犯人身（罪），袭击（罪）:

a case of robbery and assault

一宗抢劫袭击案

He was jailed for assault.

他因人身侵犯而入狱。

victims of indecent assault

遭猥亵的受害者

sexual assaults on women

对女性的性侵犯

Several soldiers have been charged with assault .

几名士兵被控侵犯人身。

[C,U] a military attack to take control of a place controlled by the enemy

（军事）袭击，攻击:

an unsuccessful assault on the enemy lines

对敌军防线失败的攻击

The refugee camp came under assault again last night.

昨晚难民营再次遭袭。

a powerful assault rifle

强力突击步枪

[C,U] a strong spoken or written criticism of someone else's ideas, plans etc

抨击;

an assault on the capitalist system

对资本主义制度的抨击

Traditional family values are increasingly under assault.

传统的家庭价值观日益受到抨击。

[C] an attempt to achieve something difficult, especially using physical force

闯关，冲击（难关）〔尤指靠体力活动〕:

an assault on Mt Everest

(=an attempt to climb it) 攀登珠穆朗玛峰的尝试

to attack someone in a violent way

猛袭，攻击，袭击:

Two men assaulted him after he left the bar.

他离开酒吧之后，两名男子袭击了他。

He was found guilty of indecently assaulting a student.

他猥亵一名学生，被判有罪。

[literary] if a feeling, sound, smell etc assaults you, it affects you in a way that makes you uncomfortable or upset

使感到难受，困扰:

The noises and smells of the market assaulted her senses.

市场里的噪音和气味侵袭她的感官神经。

to strongly criticize someone's ideas, plans etc

抨击，攻击，严厉批评

to try to do something very difficult

（设法）攻克，解决〔难题〕:

a task force to assault the problems

解决这些问题的特别工作小组