Definition from Wiktionary, the free dictionary - Rhymes: -eɪʃən
indentation (plural indentations) - The act of indenting or
state of being indented. - A notch or recess, in the margin or
border of anything; as, the indentations of a leaf, of the
coast, etc. - A recess or sharp depression in any surface. - 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. - A measure of
the distance from the flush line; as, an indentation of one em,
or of two ems. notch or recess in a margin or border recess or
sharp depression in a surface act of beginning a line at a
distance from the flush line