As a Noun:
1. The way in which two thing are unlike each other. English = difference.
2. The thing that makes one thing different from another. English = distinction.
As a Verb or Adjective:
1. For one thing to be unlike another thing in some way. English = (be) different, (be) unlike; differ from.
1. Used to introduce a statement which contrasts with what you have just said. English = differently, but, yet, although.