"murderer" meaning in English

{
  "categories": [
    {
      "kind": "other",
      "name": "Terms suffixed with -er",
      "parents": [],
      "source": "w"
    }
  ],
  "etymology_templates": [
    {
      "args": {
        "1": "murder",
        "2": "er"
      },
      "expansion": "murder + -er",
      "name": "ety-suffix"
    }
  ],
  "etymology_text": "murder + -er",
  "forms": [
    {
      "form": "murderer",
      "tags": [
        "singular"
      ]
    },
    {
      "form": "murderers",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "expansion": "[POS TABLE]",
      "name": "noun"
    }
  ],
  "hyphenation": "mur‧der‧er",
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [],
      "examples": [
        {
          "text": "The murderer is a 30 year old man."
        }
      ],
      "glosses": [
        "A murderer is someone who kills someone else."
      ],
      "id": "simple-murderer-en-noun-PooYjUOB",
      "raw_tags": [
        "countable"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/ˈmɝdərɚ/",
      "tags": [
        "US"
      ]
    },
    {
      "ipa": "/ˈmɜːdərə/",
      "tags": [
        "UK"
      ]
    },
    {
      "audio": "en-us-murderer.ogg",
      "tags": [
        "US"
      ]
    }
  ],
  "word": "murderer"
}

{
  "categories": [
    "Terms suffixed with -er"
  ],
  "etymology_templates": [
    {
      "args": {
        "1": "murder",
        "2": "er"
      },
      "expansion": "murder + -er",
      "name": "ety-suffix"
    }
  ],
  "etymology_text": "murder + -er",
  "forms": [
    {
      "form": "murderer",
      "tags": [
        "singular"
      ]
    },
    {
      "form": "murderers",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "expansion": "[POS TABLE]",
      "name": "noun"
    }
  ],
  "hyphenation": "mur‧der‧er",
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "Countable nouns"
      ],
      "examples": [
        {
          "text": "The murderer is a 30 year old man."
        }
      ],
      "glosses": [
        "A murderer is someone who kills someone else."
      ],
      "raw_tags": [
        "countable"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/ˈmɝdərɚ/",
      "tags": [
        "US"
      ]
    },
    {
      "ipa": "/ˈmɜːdərə/",
      "tags": [
        "UK"
      ]
    },
    {
      "audio": "en-us-murderer.ogg",
      "tags": [
        "US"
      ]
    }
  ],
  "word": "murderer"
}