"gravitational slingshot" meaning in English

{
  "forms": [
    {
      "form": "gravitational slingshots",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
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      "args": {},
      "expansion": "gravitational slingshot (plural gravitational slingshots)",
      "name": "en-noun"
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  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "alt_of": [
        {
          "word": "gravity assist"
        }
      ],
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        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Orbits",
          "orig": "en:Orbits",
          "parents": [
            "Astronautics",
            "Curves",
            "Gravity",
            "Space",
            "Applied sciences",
            "Shapes",
            "Acceleration",
            "Astrophysics",
            "Mechanics",
            "Nature",
            "Sciences",
            "Geometry",
            "Physics",
            "Astronomy",
            "All topics",
            "Mathematics",
            "Fundamental",
            "Formal sciences"
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          "source": "w"
        }
      ],
      "glosses": [
        "Alternative form of gravity assist"
      ],
      "id": "en-gravitational_slingshot-en-noun-R78rwAQx",
      "links": [
        [
          "gravity assist",
          "gravity assist#English"
        ]
      ],
      "tags": [
        "alt-of",
        "alternative"
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    }
  ],
  "word": "gravitational slingshot"
}

{
  "forms": [
    {
      "form": "gravitational slingshots",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "gravitational slingshot (plural gravitational slingshots)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "alt_of": [
        {
          "word": "gravity assist"
        }
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        "en:Orbits"
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      "glosses": [
        "Alternative form of gravity assist"
      ],
      "links": [
        [
          "gravity assist",
          "gravity assist#English"
        ]
      ],
      "tags": [
        "alt-of",
        "alternative"
      ]
    }
  ],
  "word": "gravitational slingshot"
}