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

sin \sin\, n. oe. sinne, as. synn, syn; akin to d. zonde, os.
   sundia, ohg. sunta, g. s"unde, icel., dan.  sw. synd, l.
   sons, sontis, guilty, perhaps originally from the p. pr. of
   the verb signifying, to be, and meaning, the one who it is.
   cf. authentic, sooth.
   1. transgression of the law of god; disobedience of the
      divine command; any violation of god's will, either in
      purpose or conduct; moral deficiency in the character;
      iniquity; as, sins of omission and sins of commission.
      1913 webster

            whosoever committeth sin is the servant of sin.
                                                  --john viii.
                                                  34.
      1913 webster

            sin is the transgression of the law.  --1 john iii.
                                                  4.
      1913 webster

            i think 't no sin.
            to cozen him that would unjustly win. --shak.
      1913 webster

            enthralled
            by sin to foul, exorbitant desires.   --milton.
      1913 webster

   2. an offense, in general; a violation of propriety; a
      misdemeanor; as, a sin against good manners.
      1913 webster

            i grant that poetry's a crying sin.   --pope.
      1913 webster

   3. a sin offering; a sacrifice for sin.
      1913 webster

            he hath made him to be sin for us, who knew no sin.
                                                  --2 cor. v.
                                                  21.
      1913 webster

   4. an embodiment of sin; a very wicked person. r.
      1913 webster

            thy ambition,
            thou scarlet sin, robbed this bewailing land
            of noble buckingham.                  --shak.
      1913 webster

   note: sin is used in the formation of some compound words of
         obvious signification; as, sin-born; sin-bred,
         sin-oppressed, sin-polluted, and the like.
         1913 webster

   actual sin, canonical sins, original sin, venial sin.
      see under actual, canonical, etc.

   deadly sins, or mortal sins r. c. ch., willful and
      deliberate transgressions, which take away divine grace;
      -- in distinction from vental sins. the seven deadly sins
      are pride, covetousness, lust, wrath, gluttony, envy, and
      sloth.

   sin eater, a man who according to a former practice in
      england for a small gratuity ate a piece of bread laid on
      the chest of a dead person, whereby he was supposed to
      have taken the sins of the dead person upon himself.

   sin offering, a sacrifice for sin; something offered as an
      expiation for sin.
      1913 webster

   syn: iniquity; wickedness; wrong. see crime.
        1913 webster
see also:
authentic sooth actual sin canonical sins original sin venial sin 
actual canonical deadly sins mortal sins sin eater 
sin offering crime 

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

venial \ve"nial\, a. of. venial, f. v'eniel, l. venialis,
   from venia forgiveness, pardon, grace, favor, kindness; akin
   to venerari to venerate. see venerate.
   1. capable of being forgiven; not heinous; excusable;
      pardonable; as, a venial fault or transgression.
      1913 webster

            so they do nothing, 't is a venial slip. --shak.
      1913 webster

   2. allowed; permitted. obs. "permitting him the while
      venial discourse unblamed." --milton.
      1913 webster

   venial sin r. c. theol., a sin which weakens, but does
      not wholly destroy, sanctifying grace, as do mortal, or
      deadly, sins.
      1913 webster -- ve"nially, adv. -- ve"nialness,
      n. --bp. hall.
      1913 webster
see also:
venerate venial sin ve"nially ve"nialness 

[3] : WordNet (r) 2.0

venial sin
     n : a pardonable sin regarded as entailing only a partial loss
         of grace ant: mortal sin
see also:
mortal sin 

Venial >> V Words
Venial, definition of term: Venial
venial_pag1.html

Venial Sin >> V Words
Venial Sin, definition of term: Venial Sin
venial+sin_pag1.html