then Definition

then
adverb

1. At that time.
2. Soon or immediately after that.

Example: I looked at him, then turned away
3. In that case; that being so; as a necessary consequence.

Example: What would we do then?
Example: If you're tired, then you should rest
4. Also; in addition.

Example: Then there's the cost to take into account
5. Used to continue a narrative after a break or digression.

Example: By the time she got to the top, then, it had started to snow
6. Used especially at the end of questions which ask for an explanation or opinion, etc, or which ask for or assume agreement

Example: Your mind is made up, then?

noun

1. That time.

Example: But until then, I think you should stay away

adj

1. Being or acting at that time.

Example: the then Prime Minister

Idiom: then and there

At that very time and on that very spot.

Etymology: Anglo-Saxon thonne.