A more thorough explanation:

Definition: Enclose (verb) means to surround or encompass something by fencing or hemming it in on all sides. It can also mean to place something in a parcel or envelope.

Examples:

• The garden was enclosed by a tall fence to keep the animals out.
• Please enclose your payment in the envelope provided and mail it to the address on the form.

The first example shows how the word "enclose" is used to describe the act of surrounding or fencing in an area. In this case, a garden is enclosed by a fence to keep animals out. The second example shows how "enclose" can also be used to describe the act of placing something in an envelope or parcel. In this case, a payment is enclosed in an envelope and mailed to a specific address.