In'den-tā'tion, n.

n. 1. A notch; a cut in the margin of paper or other things. Woodward.

2. A recess or depression in any border.
3. (Print.) The act of beginning the first line of a paragraph further in from the margin than the other lines (called a common indentation), or of beginning the second line and those following it further in than the first line (called a hanging indentation).