a part of a coat, etc. that you can pull up to cover the back and top of your head 风帽，兜帽（外衣的一部分，可拉起蒙住头颈） 
a jacket with a detachable hood 有可拆卸风帽的夹克
Extra ExamplesTopics Clothes and Fashionc1He was wearing a blue anorak with the hood up. 他穿着一件带帽的蓝色短风衣，风帽拉起来罩在头上。 She put up her hood when it started to rain. 下雨了，她把风帽拉了起来。 You can always put your hood up if it rains. 下雨时可随时戴上兜帽。
Oxford Collocations Dictionaryverb + hood- pull up
- put up
- lower
- …
- with the hood down
- with the hood up
a piece of cloth put over somebody’s face and head so that they cannot be recognized or so that they cannot see （布质）面罩 The victim was sitting tied to a chair with a black hood over her head. 受害者被绑坐在椅子上，她头上蒙着黑色面罩。
Oxford Collocations Dictionaryverb + hood- pull up
- put up
- lower
- …
- with the hood down
- with the hood up
a piece of coloured silk or fur worn over an academic gown to show the kind of degree held by the person wearing it 学位连领帽（表示学位种类） - (especially British English)
a folding cover over a car, child's buggy, etc. （汽车等的）折叠式车篷 - (North American English) (British English bonnet)
the metal part over the front of a vehicle, usually covering the engine （车辆的）引擎盖 
the sound of a bird hitting the hood of the car 鸟撞到汽车发动机罩的声音
Oxford Collocations Dictionaryadjective- car
- crumpled
- dented
- …
- open
- pop
- close
- …
- the hood of a/the car
a cover placed over a device or machine, for example, to protect it （设备或机器的）防护罩，罩 
a lens hood 镜头遮光罩 an extractor hood (= one that removes cooking smells from a kitchen) （厨房）排气罩
- (especially North American English, slang)
hoodlum (= a violent criminal, especially one who is part of a gang) 暴徒，恶棍（尤指属于某团伙者） - (also ’hood)(especially North American English, slang)
a neighbourhood, especially a person’s own neighbourhood 街区；邻里；左邻右舍
Word Originsenses 1 to 6 Old English hōd, of West Germanic origin; related to Dutch hoed, German Hut ‘hat’, also to hat.sense 7 1930s: abbreviation of hoodlum.sense 8 1970s: shortening of neighbourhood.
Idioms
under the hood
at the fundamental level of how something works rather than at the obvious surface level 引擎盖： 在事物工作的基本层面上，而不是在表面层面上They are urging potential job seekers to take a look under the hood of industry. 他们敦促潜在的求职者在行业的掩护下看一看。 If you look under the hood of these these technological wonders, you'll find carbon fibre components in many places. 如果你看看这些技术奇迹的幕后，你会在许多地方发现碳纤维组件。 The latest version includes numerous under-the-hood improvements. 最新版本包括许多幕后改进。