"'um" meaning in English

{
  "etymology_text": "Contracted from them.",
  "head_templates": [
    {
      "args": {
        "1": "en",
        "2": "pronoun"
      },
      "expansion": "'um",
      "name": "head"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "pron",
  "senses": [
    {
      "alt_of": [
        {
          "word": "'em"
        }
      ],
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "English pronouns",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "English third person pronouns",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        }
      ],
      "derived": [
        {
          "word": "no-see-um"
        }
      ],
      "examples": [
        {
          "ref": "1749, Henry Fielding, The History of Tom Jones, a Foundling, volume (please specify |volume=I to VI), London: A[ndrew] Millar, […], →OCLC:",
          "text": "They call themselves gentlemen, I warrant you; but, as my first husband used to say, they should remember it is we that pay them. And to be sure it is very hard upon us to be obliged to pay them, and to keep 'um too, as we publicans are.",
          "type": "quote"
        }
      ],
      "glosses": [
        "Alternative form of 'em"
      ],
      "id": "en-'um-en-pron-MH4RUomq",
      "links": [
        [
          "'em",
          "'em#English"
        ]
      ],
      "tags": [
        "alt-of",
        "alternative"
      ]
    }
  ],
  "word": "'um"
}

{
  "derived": [
    {
      "word": "no-see-um"
    }
  ],
  "etymology_text": "Contracted from them.",
  "head_templates": [
    {
      "args": {
        "1": "en",
        "2": "pronoun"
      },
      "expansion": "'um",
      "name": "head"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "pron",
  "senses": [
    {
      "alt_of": [
        {
          "word": "'em"
        }
      ],
      "categories": [
        "English contractions",
        "English entries with incorrect language header",
        "English lemmas",
        "English pronouns",
        "English terms with quotations",
        "English third person pronouns",
        "Pages with 1 entry",
        "Pages with entries"
      ],
      "examples": [
        {
          "ref": "1749, Henry Fielding, The History of Tom Jones, a Foundling, volume (please specify |volume=I to VI), London: A[ndrew] Millar, […], →OCLC:",
          "text": "They call themselves gentlemen, I warrant you; but, as my first husband used to say, they should remember it is we that pay them. And to be sure it is very hard upon us to be obliged to pay them, and to keep 'um too, as we publicans are.",
          "type": "quote"
        }
      ],
      "glosses": [
        "Alternative form of 'em"
      ],
      "links": [
        [
          "'em",
          "'em#English"
        ]
      ],
      "tags": [
        "alt-of",
        "alternative"
      ]
    }
  ],
  "word": "'um"
}