Entry 1 sense Webster, 1913 Slaughterhouse /slôt'-ẽrh-ousˌ/ · Slaugh·ter·house · IPA /ˈsloː.tə(ɹ).haʊs/ 01 n. A house where beasts are butchered for the market. 1. A house where beasts are butchered for the market.