add-on

US 
UK 
  • n.附加物;附加装置
  • Web附加元件;附加组件;扩展
Plural Form:add-ons  
add-on
n.
1.
附加物;附加装置a thing that is added to sth else
The company offers scuba-diving as an add-on to the basic holiday price.
这家公司提供戴水肺潜水活动,费用不含在基本度假费用内。
add-on software(= added to a computer)
计算机附加软件

Sample Sentence

Definition:
Category:AllAll,OralOral,WrittenWritten,TitleTitle,TechnicalTechnical
Source:AllAll,DictionaryDictionary,WebWeb
Difficulty:AllAll,EasyEasy,MiddleMiddle,HardHard