I really hate to turn this into a lecture, and I'm very sorry in advance, but,
The literal meaning of introvert is people who are drained of energy from social activities. Being antisocial is a completely different thing from being introverted, though it is completely possible to be both at the same time. One can be outgoing and like talking to people but still be an introvert because they are drained of their energy by doing so. Not every outgoing loud person is an extrovert. One can be antisocial and not like talking to people and be an extrovert as well. It's actually very common.
Introvert is not a personality trait or a synonym for antisocial.