The Collaborative International Dictionary of English v.0.48: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. [1913 Webster]