'Indentation' definitions:

Definition of 'indentation'

(from WordNet)
noun
A concave cut into a surface or edge (as in a coastline) [syn: indentation, indenture]
noun
The formation of small pits in a surface as a consequence of corrosion [syn: pitting, roughness, indentation]
noun
The space left between the margin and the start of an indented line [syn: indentation, indention, indent, indenture]
noun
The act of cutting into an edge with toothlike notches or angular incisions

Definition of 'Indentation'

From: GCIDE
  • Indentation \In`den*ta"tion\, n.
  • 1. The act of indenting or state of being indented. [1913 Webster]
  • 2. A notch or recess, in the margin or border of anything; as, the indentations of a leaf, of the coast, etc. [1913 Webster]
  • 3. A recess or sharp depression in any surface. [1913 Webster]
  • 4. (Print.) (a) 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. (b) The measure of the distance; as, an indentation of one em, or of two ems. [1913 Webster]
  • Hanging indentation, or Reverse indentation, indentation of all the lines of a paragraph except the first, which is a full line; also called a hanging indent. [1913 Webster]