The Collaborative International Dictionary of English v.0.48:

Indent \In*dent"\, v. t. [imp. & p. p. Indented; p. pr. & vb.
   n. Indenting.] [OE. endenten to notch, fit in, OF.
   endenter, LL. indentare, fr. L. in + dens, dentis, tooth. See
   Tooth, and cf. Indenture.]
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   1. To notch; to jag; to cut into points like a row of teeth;
      as, to indent the edge of paper.
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   2. To dent; to stamp or to press in; to impress; as, indent a
      smooth surface with a hammer; to indent wax with a stamp.
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   3. [Cf. Indenture.] To bind out by indenture or contract;
      to indenture; to apprentice; as, to indent a young man to
      a shoemaker; to indent a servant.
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   4. (Print.) To begin (a line or lines) at a greater or less
      distance from the margin; as, to indent the first line of
      a paragraph one em; to indent the second paragraph two ems
      more than the first. See Indentation, and Indention.
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   5. (Mil.) To make an order upon; to draw upon, as for
      military stores. [India] --Wilhelm.
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The Collaborative International Dictionary of English v.0.48:

Indenting \In*dent"ing\, n.
   Indentation; an impression like that made by a tooth.
   [1913 Webster]