"slower-moving" meaning in English

{
  "head_templates": [
    {
      "args": {
        "1": "en",
        "2": "comparative adjective"
      },
      "expansion": "slower-moving",
      "name": "head"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "adj",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
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          "source": "w"
        }
      ],
      "examples": [
        {
          "ref": "1962 January, “Talking of Trains: Track re-arrangement at Colwich”, in Modern Railways, page 10",
          "text": "It will also enable slower-moving freight trains to be recessed in the new down goods loop to await, if necessary, a suitable margin before proceeding to Stafford or Stoke and so reduce confliction with other main-line trains.",
          "type": "quotation"
        }
      ],
      "form_of": [
        {
          "extra": "more slow-moving",
          "word": "slow-moving"
        }
      ],
      "glosses": [
        "comparative form of slow-moving: more slow-moving"
      ],
      "id": "en-slower-moving-en-adj-uyvT8NL~",
      "links": [
        [
          "slow-moving",
          "slow-moving#English"
        ]
      ],
      "tags": [
        "comparative",
        "form-of"
      ]
    }
  ],
  "word": "slower-moving"
}

{
  "head_templates": [
    {
      "args": {
        "1": "en",
        "2": "comparative adjective"
      },
      "expansion": "slower-moving",
      "name": "head"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "adj",
  "senses": [
    {
      "categories": [
        "English comparative adjectives",
        "English entries with incorrect language header",
        "English non-lemma forms",
        "English terms with quotations"
      ],
      "examples": [
        {
          "ref": "1962 January, “Talking of Trains: Track re-arrangement at Colwich”, in Modern Railways, page 10",
          "text": "It will also enable slower-moving freight trains to be recessed in the new down goods loop to await, if necessary, a suitable margin before proceeding to Stafford or Stoke and so reduce confliction with other main-line trains.",
          "type": "quotation"
        }
      ],
      "form_of": [
        {
          "extra": "more slow-moving",
          "word": "slow-moving"
        }
      ],
      "glosses": [
        "comparative form of slow-moving: more slow-moving"
      ],
      "links": [
        [
          "slow-moving",
          "slow-moving#English"
        ]
      ],
      "tags": [
        "comparative",
        "form-of"
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    }
  ],
  "word": "slower-moving"
}