Definitions for "enclosing"
The process of folding and inserting printed material into an envelope. Can be carried out manually, but it is more common to do it by machine for large-scale mailings.
The physical folding and insertion of printed materials into an envelope. This process can be carried out by hand or by machine.
the act of surrounding something with something else, so that it is inside the surrounding object.
the act of enclosing something inside something else