to set (a line of text, a paragraph, etc) in from the margin
to notch the edge of (something)
to draw up (a legal document) in two or more exact copies
in former times, to cut or divide (a document drawn up in duplicate, triplicate, etc) to produce two or more copies with edges that can be lined up to ensure their authenticity
chiefly Brit to make an official requisition or order for (something)
to form an indentation
chiefly Brit (often + on/for) to make an official requisition or order
indenter noun
indentor noun
[Middle English indenten from early French endenter, from en-1 + dent tooth, from Latin dent-, dens]