1. 1. The act of indenting.
   2. The condition of being indented.
2. The blank space between a margin and the beginning of an indented line.
3. A notch or jagged cut in an edge.
4. A recess, as in a border or coastline.

The American Heritage® Dictionary of the English Language, Fourth Edition Copyright © 2007, 2000 by Houghton Mifflin Company. Updated in 2009. Published by Houghton Mifflin Company. All rights reserved.