[C] a warm piece of clothing like a coat without sleeves that hangs loosely from your shoulders

斗篷，披风

[sing.] an organization, activity, or way of behaving that deliberately protects someone or keeps something secret

伪装; 掩盖物; 幌子:

the cloak of secrecy around the affair

这一事件保密的外衣

The political party is used as a cloak for terrorist activities.

这个政党被用作搞恐怖活动的幌子。

prejudice hiding under the cloak of religion

打着宗教旗号的偏见

to deliberately hide facts, feelings etc so that people do not see or understand them – used especially in news reports

掩盖，掩饰〔事实、情感等; 尤用于新闻报道〕:

The talks have been cloaked in secrecy.

会谈内容被保密起来。

[literary] to cover something, for example with darkness or snow

笼罩，遮盖:

hills cloaked in mist

雾霭笼罩下的群山

The riders were cloaked (=they wore cloaks).

骑手都穿着披风。