The Collaborative International Dictionary of English v.0.48:

Pale \Pale\, v. i. [imp. & p. p. Paled (p[=a]ld); p. pr. & vb.
   n. Paling.]
   To turn pale; to lose color or luster. --Whittier.
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         Apt to pale at a trodden worm.           --Mrs.
                                                  Browning.
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The Collaborative International Dictionary of English v.0.48:

Paling \Pal"ing\, n.
   1. Pales, in general; a fence formed with pales or pickets; a
      limit; an inclosure.
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            They moved within the paling of order and decorum.
                                                  --De Quincey.
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   2. The act of placing pales or stripes on cloth; also, the
      stripes themselves. [Obs.] --Chaucer.
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   Paling board, one of the slabs sawed from the sides of a
      log to fit it to be sawed into boards. [Eng.]
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WordNet (r) 3.0 (2006):

paling
    n 1: a fence made of upright pickets [syn: picket fence,
         paling]