"DM" meaning in Japonais

{
  "categories": [
    {
      "kind": "other",
      "name": "Mots en japonais issus d’un mot en anglais",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "Noms communs en japonais",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "Japonais",
      "orig": "japonais",
      "parents": [],
      "source": "w"
    }
  ],
  "etymology_texts": [
    "De l’anglais direct mail."
  ],
  "forms": [
    {
      "form": "ディーエム",
      "tags": [
        "katakana"
      ]
    },
    {
      "form": "dīemu",
      "tags": [
        "transcription"
      ]
    },
    {
      "form": "ディーエム",
      "ipas": [
        "\\diː˨˦.e̞˦.mɯ˦.◌˦\\"
      ],
      "raw_tags": [
        "Prononciation"
      ]
    }
  ],
  "lang": "Japonais",
  "lang_code": "ja",
  "pos": "noun",
  "pos_title": "Nom commun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Lexique en japonais de la publicité",
          "parents": [],
          "source": "w"
        }
      ],
      "glosses": [
        "Message publiposté, lettre de publicité directement envoyée à un individu."
      ],
      "id": "fr-DM-ja-noun-UUNPME~x",
      "raw_tags": [
        "Publicité"
      ]
    }
  ],
  "word": "DM"
}

{
  "categories": [
    "Mots en japonais issus d’un mot en anglais",
    "Noms communs en japonais",
    "japonais"
  ],
  "etymology_texts": [
    "De l’anglais direct mail."
  ],
  "forms": [
    {
      "form": "ディーエム",
      "tags": [
        "katakana"
      ]
    },
    {
      "form": "dīemu",
      "tags": [
        "transcription"
      ]
    },
    {
      "form": "ディーエム",
      "ipas": [
        "\\diː˨˦.e̞˦.mɯ˦.◌˦\\"
      ],
      "raw_tags": [
        "Prononciation"
      ]
    }
  ],
  "lang": "Japonais",
  "lang_code": "ja",
  "pos": "noun",
  "pos_title": "Nom commun",
  "senses": [
    {
      "categories": [
        "Lexique en japonais de la publicité"
      ],
      "glosses": [
        "Message publiposté, lettre de publicité directement envoyée à un individu."
      ],
      "raw_tags": [
        "Publicité"
      ]
    }
  ],
  "word": "DM"
}