manslaughter

The killing of a person without malice aforethought but with either the intention to commit an unlawful act that leads to an unintended death, or with an otherwise murderous intent that is extenuated by some partial defense, such as acting under the influence of an extreme emotional disturbance occasioned by a substantial provocation on the part of the victim.

The killing of a human being by a human being, or of men by men; homicide; human slaughter.

Specifically—2. In law, the unlawful killing of another without malice either express or implied, which may be either voluntarily, upon a sudden heat, or involuntarily, but in the commission of some unlawful act. Blackstone.

The slaying of a human being; destruction of men.

The unlawful killing of a man, either in negligence or incidentally to the commission of some unlawful act, but without specific malice, or upon a sudden excitement of anger.

An act of killing a human being unlawfully, but not wilfully (as opposed to murder).

homicide without malice aforethought