At midnight, there was a cry, ‘Behold, the bridegroom! Come out to meet him!’
This is a parable, of course, but follows Jewish wedding practices. The wedding was held at the home of the bride's parents. The bridegroom would come there and, of course, be announced because his arrival meant the wedding would begin.
In ancient Israel, the bride to be and her family and friends gathered together under a canopy to shield them from the heat of the day and waited for the groom to arrive. At some point, someone with keen eyesight would see the groom coming from afar and call out "the bridegroom comes".
Not a trivial question. Again is an adverb. Again = back to the original place or condition or “once more or as before”
“Get some rest and you'll soon be well again.”
In your example “Close the window again”, it is difficult to regard again as an adverb qualifying close. Rather, it seems to refer adjectivally to the previous state of the ...