What does 'enclosed' mean in the following sentence:
We’re all so looking forward to seeing you here in Delhi again. Plenty of issues to discuss, as you’ll see from the enclosed agenda.

Question

Answer

I assume this is a letter or some other kind of mail.  (Or the speaker has just handed an envelope to the listener.)  The enclosed thing is the thing I send along with my letter. It is similar to "included."
a common business phrase:  "Please find enclosed..."

The email equivalent is an attachment.

Evden çıkmadan dil öğrenme fırsatını kaçırmayın. Deneyimli dil eğitmenlerimizden oluşan seçkimize göz atın ve ilk dersinize şimdi kaydolun!