Definitions of indentation

1. the space left between the margin and the start of an indented line

2. A notch or recess, in the margin or border of anything; as, the indentations of a leaf, of the coast, etc.

3. A recess or sharp depression in any surface.

4. The measure of the distance; as, an indentation of one em, or of two ems.

5. The act of indenting, or state of being indented.

6. A small hollow or depression, as from a blow; a binding out to service; a dent or dint; a space left in a margin.

7. Act of indenting or notching: notch: recess.

8. Act of notching; north.

9. The act of indenting.

10. A cut or notch.

11. A notching; a notch in a margin; a recess or depression in any border.

12. A notch or jag; a cut or depression in any margin or border.