The Collaborative International Dictionary of English v.0.48:

Stretch \Stretch\, v. t. [imp. & p. p. Stretched; p. pr. & vb.
   n. Stretching.] [OE. strecchen, AS. streccan; akin to D.
   strekken, G. strecken, OHG. strecchen, Sw. str[aum]cka, Dan.
   straekke; cf. AS. straeck, strec, strong, violent, G. strack
   straight; of uncertain origin, perhaps akin to E. strong. Cf.
   Straight.]
   1. To reach out; to extend; to put forth.
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            And stretch forth his neck long and small.
                                                  --Chaucer.
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            I in conquest stretched mine arm.     --Shak.
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   2. To draw out to the full length; to cause to extend in a
      straight line; as, to stretch a cord or rope.
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   3. To cause to extend in breadth; to spread; to expand; as,
      to stretch cloth; to stretch the wings.
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   4. To make tense; to tighten; to distend forcibly.
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            The ox hath therefore stretched his yoke in vain.
                                                  --Shak.
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   5. To draw or pull out to greater length; to strain; as, to
      stretch a tendon or muscle.
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            Awake, my soul, stretch every nerve.  --Doddridge.
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   6. To exaggerate; to extend too far; as, to stretch the
      truth; to stretch one's credit.
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            They take up, one day, the most violent and
            stretched prerogative.                --Burke.
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The Collaborative International Dictionary of English v.0.48:

Stretching \Stretch"ing\,
   a. & n. from Stretch, v.
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   Stretching course (Masonry), a course or series of
      stretchers. See Stretcher, 2. --Britton.
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WordNet (r) 3.0 (2006):

stretching
    n 1: act of expanding by lengthening or widening
    2: exercise designed to extend the limbs and muscles to their
       full extent [syn: stretch, stretching]