Source : Webster's Revised Unabridged Dictionary (1913)

Abattoir \A`bat`toir"\ ([.a]`b[.a]t`tw[aum]r"), n.; pl.
   {Abattoirs} (-tw[aum]rz"). [F., fr. abattre to beat down. See
   {Abate}.]
   A public slaughterhouse for cattle, sheep, etc.

Source : WordNet®

abattoir
     n : a building where animals are butchered [syn: {butchery}, {shambles},
          {slaughterhouse}]