"hrmm" meaning in English

{
  "lang": "English",
  "lang_code": "en",
  "pos": "intj",
  "senses": [
    {
      "alt_of": [
        {
          "word": "hrm"
        }
      ],
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        }
      ],
      "examples": [
        {
          "ref": "2009, Matthue Roth, Never Mind The Goldbergs",
          "text": "“Hrmm. I see your stylist's been working nights.” He surveyed the train wreck of my hair in the rearview mirror.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "Alternative form of hrm"
      ],
      "id": "en-hrmm-en-intj-LlnKLv6g",
      "links": [
        [
          "hrm",
          "hrm#English"
        ]
      ],
      "tags": [
        "alt-of",
        "alternative"
      ]
    }
  ],
  "word": "hrmm"
}

{
  "lang": "English",
  "lang_code": "en",
  "pos": "intj",
  "senses": [
    {
      "alt_of": [
        {
          "word": "hrm"
        }
      ],
      "categories": [
        "English entries with incorrect language header",
        "English interjections",
        "English lemmas",
        "English terms with quotations",
        "English words without vowels",
        "Quotation templates to be cleaned"
      ],
      "examples": [
        {
          "ref": "2009, Matthue Roth, Never Mind The Goldbergs",
          "text": "“Hrmm. I see your stylist's been working nights.” He surveyed the train wreck of my hair in the rearview mirror.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "Alternative form of hrm"
      ],
      "links": [
        [
          "hrm",
          "hrm#English"
        ]
      ],
      "tags": [
        "alt-of",
        "alternative"
      ]
    }
  ],
  "word": "hrmm"
}