- the indenting of a line or lines in writing or printing.
- the blank space left by indenting.
- the act of indenting; state of being indented.
- Archaic. an indentation or notch.
- another word for indentation (def. 4)
1763, formed irregularly from indent + -ation. It could be a useful word if it split with indentation the two senses (relating to margins and to dents) of that word, but indention, too, is used in both.