What is the difference between an adapter and a charger?

What is the difference between an adapter and a charger

      1. The definition is not required: an adapter is an interface converter, an information interface, 
or an independent hardware interface device that enables hardware and electronic interfaces to connect with other hardware and electronic interfaces. Charger is an advanced intelligent dynamic adjustment charging technology.
      2. Different composition structure: adapter is composed of shell, capacitor, power transformer, control chip, etc., charger is composed of shell, input end, flexible circuit board, electronic components, etc.
      3. Different application fields: Adapter application fields include LED lighting field, notebook computer, digital communication field, railway vehicle instrument field, etc. The application field of charger includes electric carrier, electric tourist car, locomotive, electric forklift, electric lift truck, electric boat and so on