[1] : The Collaborative International Dictionary of English v.0.48

pay \pay\, v. t. imp.  p. p. paid p=ad; p. pr.  vb. n.
   paying. oe. paien, f. payer, fr. l. pacare to pacify,
   appease, fr. pax, pacis, peace. see peace.
   1. to satisfy, or content; specifically, to satisfy another
      person for service rendered, property delivered, etc.; to
      discharge one's obligation to; to make due return to; to
      compensate; to remunerate; to recompense; to requite; as,
      to pay workmen or servants.
      1913 webster

            may no penny ale them pay i. e., satisfy. --p.
                                                  plowman.
      1913 webster

            she pays me with disdain.           --dryden.
      1913 webster

   2. hence, figuratively: to compensate justly; to requite
      according to merit; to reward; to punish; to retort or
      retaliate upon.
      1913 webster

            for which, or pay me quickly, or i'll pay you. --b.
                                                  jonson.
      1913 webster

   3. to discharge, as a debt, demand, or obligation, by giving
      or doing what is due or required; to deliver the amount or
      value of to the person to whom it is owing; to discharge a
      debt by delivering money owed. "pay me that thou owest."
      --matt. xviii. 28.
      1913 webster

            have patience with me, and i will pay thee all.
                                                  --matt. xviii.
                                                  26.
      1913 webster

            if they pay this tax, they starve.    --tennyson.
      1913 webster

   4. to discharge or fulfill, as a duy; to perform or render
      duty, as that which has been promised.
      1913 webster

            this day have i paid my vows.         --prov. vii.
                                                  14.
      1913 webster

   5. to give or offer, without an implied obligation; as, to
      pay attention; to pay a visit.
      1913 webster

            not paying me a welcome.              --shak.
      1913 webster

   to pay off.
      a to make compensation to and discharge; as, to pay off
          the crew of a ship.
      b to allow a thread, cord, etc. to run off; to unwind.
      c to bribe.

   to pay one's duty, to render homage, as to a sovereign or
      other superior.

   to pay out naut., to pass out; hence, to slacken; to
      allow to run out; as, to pay out more cable. see under
      cable.

   to pay the piper, to bear the cost, expense, or trouble.
      colloq.
      1913 webster
see also:
paid paying peace to pay off to pay one's duty to pay out 
cable to pay the piper 

[2] : The Collaborative International Dictionary of English v.0.48

piper \pip"er\, n.
   1. mus. one who plays on a pipe, or the like, esp. on a
      bagpipe. "the hereditary piper and his sons." --macaulay.
      1913 webster

   2. zool.
      a a common european gurnard trigla lyra, having a
          large head, with prominent nasal projection, and with
          large, sharp, opercular spines.
      b a sea urchin goniocidaris hystrix having very long
          spines, native of both the american and european
          coasts.
          1913 webster

   to pay the piper, to bear the cost, expense, or trouble.
      1913 webster
see also:
trigla lyra goniocidaris hystrix to pay the piper 

Pay >> P Words
Pay, definition of term: Pay
pay_pag1.html

Pay For >> P Words
Pay For, definition of term: Pay For
pay+for_pag1.html

Pay Off >> P Words
Pay Off, definition of term: Pay Off
pay+off_pag1.html

Pay Up >> P Words
Pay Up, definition of term: Pay Up
pay+up_pag1.html

Pay Dirt >> P Words
Pay Dirt, definition of term: Pay Dirt
pay+dirt_pag1.html

Pay Day >> P Words
Pay Day, definition of term: Pay Day
pay+day_pag1.html

Pay Attention >> P Words
Pay Attention, definition of term: Pay Attention
pay+attention_pag1.html

Pay Back >> P Words
Pay Back, definition of term: Pay Back
pay+back_pag1.html

Half Pay >> H Words
Half Pay, definition of term: Half Pay
half+pay_pag1.html