"M/s" meaning in English

{
  "head_templates": [
    {
      "args": {
        "1": "-"
      },
      "expansion": "M/s (uncountable)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "alt_of": [
        {
          "word": "Master/slave"
        }
      ],
      "categories": [
        {
          "kind": "other",
          "name": "English coordinated pairs",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "English words spelled without vowels",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "langcode": "en",
          "name": "BDSM",
          "orig": "en:BDSM",
          "parents": [],
          "source": "w"
        }
      ],
      "examples": [
        {
          "bold_text_offsets": [
            [
              0,
              3
            ]
          ],
          "ref": "2014, Robert J. Rubel, Ph.D., M. Jen Fairfield, Master/slave Mastery—Updated handbook of concepts, approaches, and practices:",
          "text": "M/s structured relationships differ in many ways from vanilla relationships. One important difference is that you have the opportunity to discuss and negotiate a number of key issues up-front. These issues become the basis of our contract.",
          "type": "quote"
        }
      ],
      "glosses": [
        "Abbreviation of Master/slave."
      ],
      "id": "en-M/s-en-noun-y6LchdvP",
      "links": [
        [
          "BDSM",
          "BDSM"
        ],
        [
          "Master/slave",
          "Master/slave#English"
        ]
      ],
      "raw_glosses": [
        "(BDSM) Abbreviation of Master/slave."
      ],
      "tags": [
        "abbreviation",
        "alt-of",
        "uncountable"
      ],
      "topics": [
        "BDSM",
        "lifestyle",
        "sexuality"
      ]
    }
  ],
  "word": "M/s"
}

{
  "head_templates": [
    {
      "args": {
        "1": "-"
      },
      "expansion": "M/s (uncountable)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "alt_of": [
        {
          "word": "Master/slave"
        }
      ],
      "categories": [
        "English abbreviations",
        "English coordinated pairs",
        "English entries with incorrect language header",
        "English lemmas",
        "English nouns",
        "English terms spelled with /",
        "English terms with quotations",
        "English uncountable nouns",
        "English words spelled without vowels",
        "Pages with 1 entry",
        "Pages with entries",
        "en:BDSM"
      ],
      "examples": [
        {
          "bold_text_offsets": [
            [
              0,
              3
            ]
          ],
          "ref": "2014, Robert J. Rubel, Ph.D., M. Jen Fairfield, Master/slave Mastery—Updated handbook of concepts, approaches, and practices:",
          "text": "M/s structured relationships differ in many ways from vanilla relationships. One important difference is that you have the opportunity to discuss and negotiate a number of key issues up-front. These issues become the basis of our contract.",
          "type": "quote"
        }
      ],
      "glosses": [
        "Abbreviation of Master/slave."
      ],
      "links": [
        [
          "BDSM",
          "BDSM"
        ],
        [
          "Master/slave",
          "Master/slave#English"
        ]
      ],
      "raw_glosses": [
        "(BDSM) Abbreviation of Master/slave."
      ],
      "tags": [
        "abbreviation",
        "alt-of",
        "uncountable"
      ],
      "topics": [
        "BDSM",
        "lifestyle",
        "sexuality"
      ]
    }
  ],
  "word": "M/s"
}