"make-or-break" meaning in English

{
  "head_templates": [
    {
      "args": {
        "1": "?"
      },
      "expansion": "make-or-break",
      "name": "en-adj"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "adj",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English coordinated pairs",
          "parents": [
            "Coordinated pairs",
            "Terms by etymology"
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          "source": "w"
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      ],
      "examples": [
        {
          "text": "Prince Harry is taking girlfriend Chelsy Davy on a make-or-break African holiday in a bid to heal their troubled relationship."
        }
      ],
      "glosses": [
        "Resulting in either success or failure."
      ],
      "id": "en-make-or-break-en-adj-PQaQf0dK",
      "links": [
        [
          "success",
          "success"
        ],
        [
          "failure",
          "failure"
        ]
      ],
      "related": [
        {
          "word": "make-and-break"
        },
        {
          "word": "critical mass"
        },
        {
          "word": "defining moment"
        },
        {
          "word": "sink or swim"
        }
      ],
      "synonyms": [
        {
          "word": "make or break"
        }
      ]
    }
  ],
  "word": "make-or-break"
}

{
  "head_templates": [
    {
      "args": {
        "1": "?"
      },
      "expansion": "make-or-break",
      "name": "en-adj"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "adj",
  "related": [
    {
      "word": "make-and-break"
    },
    {
      "word": "critical mass"
    },
    {
      "word": "defining moment"
    },
    {
      "word": "sink or swim"
    }
  ],
  "senses": [
    {
      "categories": [
        "English adjectives",
        "English coordinated pairs",
        "English entries with incorrect language header",
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      "examples": [
        {
          "text": "Prince Harry is taking girlfriend Chelsy Davy on a make-or-break African holiday in a bid to heal their troubled relationship."
        }
      ],
      "glosses": [
        "Resulting in either success or failure."
      ],
      "links": [
        [
          "success",
          "success"
        ],
        [
          "failure",
          "failure"
        ]
      ]
    }
  ],
  "synonyms": [
    {
      "word": "make or break"
    }
  ],
  "word": "make-or-break"
}