noun, verb, -cred, -cring.| 1. | the unnecessary, indiscriminate killing of a large number of human beings or animals, as in barbarous warfare or persecution or for revenge or plunder. |
| 2. | a general slaughter, as of persons or animals: the massacre of millions during the war. |
| 3. | Informal. a crushing defeat, esp. in sports. |
| 4. | to kill unnecessarily and indiscriminately, esp. a large number of persons. |
| 5. | Informal. to defeat decisively, esp. in sports. |