murder

American Heritage® Dictionary of the English Language, Fourth Edition

1. n. The unlawful killing of one human by another, especially with premeditated malice.
2. n. Slang Something that is very uncomfortable, difficult, or hazardous: The rush hour traffic is murder.
3. n. A flock of crows. See Synonyms at flock¹.
4. v. To kill (another human) unlawfully.
5. v. To kill brutally or inhumanly.
6. v. To put an end to; destroy: murdered their chances.
7. v. To spoil by ineptness; mutilate: a speech that murdered the English language.
8. v. Slang To defeat decisively; trounce.
9. v. To commit murder.
10. idiom. get away with murder Informal To escape punishment for or detection of an egregiously blameworthy act.
11. idiom. murder will out Secrets or misdeeds will eventually be disclosed.

Century Dictionary and Cyclopedia

1. n. Homicide with malice aforethought; as legally defined, the unlawful killing of a human being, by a person of sound mind, by an act causing death within a year and a day thereafter, with premeditated malice.
2. n. Slaughter; destruction.
3. To kill; slay in or as in battle.
4. To kill (a human being) with premeditated malice; kill criminally. See murder, n., 1.
5. To kill or slaughter in an inhuman or barbarous manner.
6. To destroy; put an end to.
7. To abuse or violate grossly; mar by bad execution, pronunciation, representation, etc.: as, to murder the queen's English; the actor murdered the part he had to play.
8. Synonyms Slay, Despatch, etc. See kill.

Wiktionary

1. n. countable An act of deliberate killing of another human being.
2. n. uncountable, law The crime of deliberate killing.
3. n. uncountable, law The commission of any act which abets the commission of a crime the commission of which causes the death of a person.
4. n. uncountable Something terrible to endure.
5. n. countable A group of crows; the collective noun for crows.
6. v. To deliberately kill (a person or persons).
7. v. transitive (sports, figuratively, colloquial) To defeat decisively.
8. v. To botch or mangle
9. v. figuratively, colloquial To kick someone's ass or chew someone out (used to express one’s anger at somebody).
10. v. figuratively, colloquial, UK to devour, ravish.

GNU Webster's 1913

1. n. The offense of killing a human being with malice prepense or aforethought, express or implied; intentional and unlawful homicide.
2. v. To kill with premediated malice; to kill (a human being) willfully, deliberately, and unlawfully. See murder, n.
3. v. To destroy; to put an end to.
4. v. To mutilate, spoil, or deform, as if with malice or cruelty; to mangle.

WordNet 3.0

1. n. unlawful premeditated killing of a human being by a human being
2. v. alter so as to make unrecognizable
3. v. kill intentionally and with premeditation