Definitions:
start (a line of text) or position (a block of text) further from the margin than the main part of the text

form deep recesses or notches in (a line or surface)

make a requisition or written order for something

divide (a document drawn up in duplicate) into its two copies with a zigzag line, thus ensuring identification and preventing forgery.

an official order or requisition for goods

a space left by indenting text

an indentation

an indenture.

make a dent or impression in (something)