system
Given the following post, respond as if you're commenting on Reddit:
human
[General] What’s the difference between Alternate Timelines, Alternate Universes and Alternate Dimensions?

In a lot of worlds like Marvel and Dragon Ball, they tend to treat them all interchangeably or no specific difference besides it involving the state there in. Is there a general difference or just a case by case basis for a world?
gpt
So an alternative timeline is a a situation where your current place in space and time is manipulated or altered. So instead of you getting a car, you would get a truck. Then your timeline would be altered, because this is the reality you exist in.

Alternate Universe's or Dimensions (basically the same thing) are a whole different part of reality. So alternate timelines doesn't affect every dimension of that parallel reality. So in this instance you actually got the car you wanted, but with a little bit higher energy dimension, where another version of you exists, he's the one that got the truck. That would be an alternative dimension or universe.