As well.
One or the other of two people or things.
Introduces the first of two (or occasionally more) options or possibilities, the second (or last) of which is introduced by “or”.
Any one (of two).
Each of two; both.
In a related manner.
Used to indicate that the accompanying statement is related (connected) to a preceding statement or occurrence.
Used to indicate that the accompanying statement may not be true, but has been said to be true.