Strong AI or General AI: machine display all person-like behavior. This would be a system that can do anything a human can (perhaps without purely physical things). This is fairly generic, and includes all kinds of tasks, such as planning, moving around in the world, recognizing objects and sounds, speaking, translating, performing social or business transactions, creative work (making art or poetry), etc. Its basically Sci-Fi.
Weak AI or Narrow AI. Confined to very narrow tasks. No meaning, just tasks. Is what´s around today in technology. Artifical personal assistants, bots, etc. They are not General AI, otherwise they would get tired of your orders. The symbolic systems approach is also Weak AI. Narrow AI is doing specific tasks better than humans. NLP, image recognition, predictions, translation, etc.