"Jersey bump" meaning in English

{
  "forms": [
    {
      "form": "Jersey bumps",
      "tags": [
        "plural"
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  "head_templates": [
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      "args": {},
      "expansion": "Jersey bump (plural Jersey bumps)",
      "name": "en-noun"
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  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
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      "glosses": [
        "Synonym of Jersey barrier (“barrier used to separate lanes of traffic or to block traffic”)"
      ],
      "id": "en-Jersey_bump-en-noun-hZrjHZ8W",
      "links": [
        [
          "Jersey barrier",
          "Jersey barrier#English"
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      "synonyms": [
        {
          "extra": "barrier used to separate lanes of traffic or to block traffic",
          "tags": [
            "synonym",
            "synonym-of"
          ],
          "word": "Jersey barrier"
        }
      ]
    }
  ],
  "word": "Jersey bump"
}

{
  "forms": [
    {
      "form": "Jersey bumps",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "Jersey bump (plural Jersey bumps)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
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      ],
      "glosses": [
        "Synonym of Jersey barrier (“barrier used to separate lanes of traffic or to block traffic”)"
      ],
      "links": [
        [
          "Jersey barrier",
          "Jersey barrier#English"
        ]
      ],
      "synonyms": [
        {
          "extra": "barrier used to separate lanes of traffic or to block traffic",
          "tags": [
            "synonym",
            "synonym-of"
          ],
          "word": "Jersey barrier"
        }
      ]
    }
  ],
  "word": "Jersey bump"
}