enclose

To put something around someone or something to hold or restrain it. My mother enclosed my medal in glass so that it wouldn't get scratched. If you let the dogs go outside alone, make sure to enclose them within the fenced part of the yard.

A message included in a letter or package to tell the recipient what they should find inside. Enclosed please find the personnel files for your new employees.

to contain someone, something, or some space inside of something. The police enclosed the people in a safe area while the accident was being cleaned up. The farmer enclosed the pig within a new pen.

Formal business writing for “it's in this envelope.” Until the middle of the 20th century, businesses corresponded in formal—some would say stilted—language. “Enclosed please find” was one phrase that, although still used by some law firms and insurance companies, is well on its way to join such archaisms as “in hand,” ult. for “ultimo” (meaning “last month” as in “I have your letter of the 15th ult. in hand . . .”), inst. for “instant” or this month, and prox. for “proximo” or next month. Perhaps e-mail abbreviations like LOL, IOW, and TTFN will someday be considered just as quaint.