Definition of indentation

• n. - The act of indenting or state of being indented.
• n. - A notch or recess, in the margin or border of anything; as, the indentations of a leaf, of the coast, etc.
• n. - A recess or sharp depression in any surface.
• n. - The act of beginning a line or series of lines at a little distance within the flush line of the column or page, as in the common way of beginning the first line of a paragraph.
• n. - The measure of the distance; as, an indentation of one em, or of two ems.