"U/S" meaning in English

{
  "head_templates": [
    {
      "args": {
        "1": "-"
      },
      "expansion": "U/S (not comparable)",
      "name": "en-adj"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "adj",
  "senses": [
    {
      "alt_of": [
        {
          "word": "unserviceable"
        },
        {
          "extra": "also u/s",
          "word": "unfit for service(WWII)"
        }
      ],
      "categories": [
        {
          "_dis": "62 38",
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w+disamb"
        },
        {
          "_dis": "62 38",
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w+disamb"
        },
        {
          "_dis": "68 32",
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w+disamb"
        }
      ],
      "glosses": [
        "Abbreviation of unserviceable; Abbreviation of unfit for service(WWII);also u/s."
      ],
      "id": "en-U/S-en-adj-LFcXu62D",
      "links": [
        [
          "unserviceable",
          "unserviceable#English"
        ],
        [
          "unfit for service(WWII)",
          "unfit for service(WWII)#English"
        ],
        [
          "u/s",
          "u/s#English"
        ]
      ],
      "tags": [
        "abbreviation",
        "alt-of",
        "not-comparable"
      ]
    }
  ],
  "word": "U/S"
}

{
  "head_templates": [
    {
      "args": {
        "1": "?"
      },
      "expansion": "U/S",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "alt_of": [
        {
          "extra": "also u/s, US",
          "word": "ultrasound"
        }
      ],
      "categories": [
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Medicine",
          "orig": "en:Medicine",
          "parents": [
            "Biology",
            "Healthcare",
            "Sciences",
            "Health",
            "All topics",
            "Body",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "Abbreviation of ultrasound; also u/s, US."
      ],
      "id": "en-U/S-en-noun-R5RO6y8m",
      "links": [
        [
          "medicine",
          "medicine"
        ],
        [
          "ultrasound",
          "ultrasound#English"
        ],
        [
          "u/s",
          "u/s#English"
        ],
        [
          "US",
          "US#English"
        ]
      ],
      "raw_glosses": [
        "(medicine) Abbreviation of ultrasound; also u/s, US."
      ],
      "tags": [
        "abbreviation",
        "alt-of"
      ],
      "topics": [
        "medicine",
        "sciences"
      ]
    }
  ],
  "word": "U/S"
}

{
  "categories": [
    "English adjectives",
    "English countable nouns",
    "English entries with incorrect language header",
    "English lemmas",
    "English nouns",
    "English nouns with unknown or uncertain plurals",
    "English terms spelled with /",
    "English uncomparable adjectives",
    "Pages with 1 entry",
    "Pages with entries"
  ],
  "head_templates": [
    {
      "args": {
        "1": "-"
      },
      "expansion": "U/S (not comparable)",
      "name": "en-adj"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "adj",
  "senses": [
    {
      "alt_of": [
        {
          "word": "unserviceable"
        },
        {
          "extra": "also u/s",
          "word": "unfit for service(WWII)"
        }
      ],
      "categories": [
        "English abbreviations"
      ],
      "glosses": [
        "Abbreviation of unserviceable; Abbreviation of unfit for service(WWII);also u/s."
      ],
      "links": [
        [
          "unserviceable",
          "unserviceable#English"
        ],
        [
          "unfit for service(WWII)",
          "unfit for service(WWII)#English"
        ],
        [
          "u/s",
          "u/s#English"
        ]
      ],
      "tags": [
        "abbreviation",
        "alt-of",
        "not-comparable"
      ]
    }
  ],
  "word": "U/S"
}

{
  "categories": [
    "English adjectives",
    "English countable nouns",
    "English entries with incorrect language header",
    "English lemmas",
    "English nouns",
    "English nouns with unknown or uncertain plurals",
    "English terms spelled with /",
    "English uncomparable adjectives",
    "Pages with 1 entry",
    "Pages with entries"
  ],
  "head_templates": [
    {
      "args": {
        "1": "?"
      },
      "expansion": "U/S",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "alt_of": [
        {
          "extra": "also u/s, US",
          "word": "ultrasound"
        }
      ],
      "categories": [
        "English abbreviations",
        "en:Medicine"
      ],
      "glosses": [
        "Abbreviation of ultrasound; also u/s, US."
      ],
      "links": [
        [
          "medicine",
          "medicine"
        ],
        [
          "ultrasound",
          "ultrasound#English"
        ],
        [
          "u/s",
          "u/s#English"
        ],
        [
          "US",
          "US#English"
        ]
      ],
      "raw_glosses": [
        "(medicine) Abbreviation of ultrasound; also u/s, US."
      ],
      "tags": [
        "abbreviation",
        "alt-of"
      ],
      "topics": [
        "medicine",
        "sciences"
      ]
    }
  ],
  "word": "U/S"
}

{
  "called_from": "form_descriptions/2278",
  "msg": "suspicious alt_of/form_of with '(': unfit for service(WWII)",
  "path": [
    "U/S"
  ],
  "section": "English",
  "subsection": "adjective",
  "title": "U/S",
  "trace": ""
}