"double-break" meaning in English

{
  "forms": [
    {
      "form": "double-breaks",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "double-break (plural double-breaks)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English 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": "en",
          "name": "Tennis",
          "orig": "en:Tennis",
          "parents": [
            "Ball games",
            "Racquet sports",
            "Sports",
            "Human activity",
            "Human behaviour",
            "Human",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "examples": [
        {
          "ref": "2012 June 28, Jamie Jackson, “Wimbledon 2012: Lukas Rosol shocked by miracle win over Rafael Nadal”, in the Guardian:",
          "text": "In the seventh game of the deciding set, one backhand came in at a thundering 99mph – this was followed by a lightening forehand return from Nadal's next serve to make it 30-love. A double-break would have left Nadal with no out-clause, but he clung on to pull the score back to 4-3.",
          "type": "quote"
        }
      ],
      "glosses": [
        "In a set, an advantage equivalent to two breaks of serve."
      ],
      "id": "en-double-break-en-noun-wS-18CWo",
      "links": [
        [
          "tennis",
          "tennis"
        ],
        [
          "set",
          "set#English:_tennis"
        ],
        [
          "breaks",
          "break#English:_tennis"
        ],
        [
          "serve",
          "serve#English"
        ]
      ],
      "raw_glosses": [
        "(tennis) In a set, an advantage equivalent to two breaks of serve."
      ],
      "synonyms": [
        {
          "word": "double break"
        }
      ],
      "topics": [
        "hobbies",
        "lifestyle",
        "sports",
        "tennis"
      ]
    }
  ],
  "word": "double-break"
}

{
  "forms": [
    {
      "form": "double-breaks",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "double-break (plural double-breaks)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "English terms with quotations",
        "Pages with 1 entry",
        "Pages with entries",
        "en:Tennis"
      ],
      "examples": [
        {
          "ref": "2012 June 28, Jamie Jackson, “Wimbledon 2012: Lukas Rosol shocked by miracle win over Rafael Nadal”, in the Guardian:",
          "text": "In the seventh game of the deciding set, one backhand came in at a thundering 99mph – this was followed by a lightening forehand return from Nadal's next serve to make it 30-love. A double-break would have left Nadal with no out-clause, but he clung on to pull the score back to 4-3.",
          "type": "quote"
        }
      ],
      "glosses": [
        "In a set, an advantage equivalent to two breaks of serve."
      ],
      "links": [
        [
          "tennis",
          "tennis"
        ],
        [
          "set",
          "set#English:_tennis"
        ],
        [
          "breaks",
          "break#English:_tennis"
        ],
        [
          "serve",
          "serve#English"
        ]
      ],
      "raw_glosses": [
        "(tennis) In a set, an advantage equivalent to two breaks of serve."
      ],
      "topics": [
        "hobbies",
        "lifestyle",
        "sports",
        "tennis"
      ]
    }
  ],
  "synonyms": [
    {
      "word": "double break"
    }
  ],
  "word": "double-break"
}