pain \pain\ p=an, n. oe. peine, f. peine, fr. l. poena,
   penalty, punishment, torment, pain; akin to gr. poinh`
   penalty. cf. penal, pine to languish, punish.
   1. punishment suffered or denounced; suffering or evil
      inflicted as a punishment for crime, or connected with the
      commission of a crime; penalty. --chaucer.
      1913 webster

            we will, by way of mulct or pain, lay it upon him.
                                                  --bacon.
      1913 webster

            interpose, on pain of my displeasure. --dryden.
      1913 webster

            none shall presume to fly, under pain of death.
                                                  --addison.
      1913 webster

   2. any uneasy sensation in animal bodies, from slight
      uneasiness to extreme distress or torture, proceeding from
      a derangement of functions, disease, or injury by
      violence; bodily distress; bodily suffering; an ache; a
      smart. "the pain of jesus christ." --chaucer.
      1913 webster

   note: pain may occur in any part of the body where sensory
         nerves are distributed, and it is always due to some
         kind of stimulation of them. the sensation is generally
         interpreted as originating at the peripheral end of the
         nerve.
         1913 webster

   3. pl. specifically, the throes or travail of childbirth.
      1913 webster

            she bowed herself and travailed, for her pains came
            upon her.                             --1 sam. iv.
                                                  19.
      1913 webster

   4. uneasiness of mind; mental distress; disquietude; anxiety;
      grief; solicitude; anguish. also called mental pain.
      --chaucer.
      1913 webster +pjc

            in rapture as in pain.                --keble.
      1913 webster

   5. see pains, labor, effort.
      1913 webster

   bill of pains and penalties. see under bill.

   to die in the pain, to be tortured to death. obs.
      --chaucer.
      1913 webster
see also:
penal pine punish mental pain pains bill of pains and penalties 
bill to die in the pain