"amas ouvert" meaning in French

{
  "forms": [
    {
      "form": "amas ouverts",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "m"
      },
      "expansion": "amas ouvert m (plural amas ouverts)",
      "name": "fr-noun"
    }
  ],
  "lang": "French",
  "lang_code": "fr",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "French entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "fr",
          "name": "Stars",
          "orig": "fr:Stars",
          "parents": [
            "Celestial bodies",
            "Space",
            "Nature",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "open cluster (star cluster)"
      ],
      "id": "en-amas_ouvert-fr-noun-S0hY8Lx1",
      "links": [
        [
          "open cluster",
          "open cluster"
        ],
        [
          "star cluster",
          "star cluster#English"
        ]
      ],
      "related": [
        {
          "word": "amas de galaxies"
        },
        {
          "word": "amas stellaire"
        },
        {
          "word": "amas globulaire"
        }
      ],
      "tags": [
        "masculine"
      ]
    }
  ],
  "word": "amas ouvert"
}

{
  "forms": [
    {
      "form": "amas ouverts",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "m"
      },
      "expansion": "amas ouvert m (plural amas ouverts)",
      "name": "fr-noun"
    }
  ],
  "lang": "French",
  "lang_code": "fr",
  "pos": "noun",
  "related": [
    {
      "word": "amas de galaxies"
    },
    {
      "word": "amas stellaire"
    },
    {
      "word": "amas globulaire"
    }
  ],
  "senses": [
    {
      "categories": [
        "French countable nouns",
        "French entries with incorrect language header",
        "French lemmas",
        "French masculine nouns",
        "French multiword terms",
        "French nouns",
        "Pages with 1 entry",
        "Pages with entries",
        "fr:Stars"
      ],
      "glosses": [
        "open cluster (star cluster)"
      ],
      "links": [
        [
          "open cluster",
          "open cluster"
        ],
        [
          "star cluster",
          "star cluster#English"
        ]
      ],
      "tags": [
        "masculine"
      ]
    }
  ],
  "word": "amas ouvert"
}