"exhaust velocity" meaning in English

{
  "forms": [
    {
      "form": "exhaust velocities",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "exhaust velocity (plural exhaust velocities)",
      "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": "topical",
          "langcode": "en",
          "name": "Aeronautics",
          "orig": "en:Aeronautics",
          "parents": [
            "Sciences",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Rocketry",
          "orig": "en:Rocketry",
          "parents": [
            "Astronautics",
            "Applied sciences",
            "Space",
            "Sciences",
            "Nature",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "examples": [
        {
          "ref": "2004, Martin J. L. Turner, Expedition Mars, Springer Science & Business, page 134",
          "text": "The lighter the molecules, the higher will be the exhaust velocity; and we already know from the rocket equation that the exhaust velocity is the most important measure of an engine's performance.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "The speed with which the exhaust gases leave the rocket engine."
      ],
      "id": "en-exhaust_velocity-en-noun-cF34b2dY",
      "links": [
        [
          "aeronautics",
          "aeronautics"
        ],
        [
          "exhaust",
          "exhaust"
        ],
        [
          "rocket engine",
          "rocket engine"
        ]
      ],
      "raw_glosses": [
        "(aeronautics) The speed with which the exhaust gases leave the rocket engine."
      ],
      "topics": [
        "aeronautics",
        "aerospace",
        "business",
        "engineering",
        "natural-sciences",
        "physical-sciences"
      ]
    }
  ],
  "word": "exhaust velocity"
}

{
  "forms": [
    {
      "form": "exhaust velocities",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "exhaust velocity (plural exhaust velocities)",
      "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",
        "en:Aeronautics",
        "en:Rocketry"
      ],
      "examples": [
        {
          "ref": "2004, Martin J. L. Turner, Expedition Mars, Springer Science & Business, page 134",
          "text": "The lighter the molecules, the higher will be the exhaust velocity; and we already know from the rocket equation that the exhaust velocity is the most important measure of an engine's performance.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "The speed with which the exhaust gases leave the rocket engine."
      ],
      "links": [
        [
          "aeronautics",
          "aeronautics"
        ],
        [
          "exhaust",
          "exhaust"
        ],
        [
          "rocket engine",
          "rocket engine"
        ]
      ],
      "raw_glosses": [
        "(aeronautics) The speed with which the exhaust gases leave the rocket engine."
      ],
      "topics": [
        "aeronautics",
        "aerospace",
        "business",
        "engineering",
        "natural-sciences",
        "physical-sciences"
      ]
    }
  ],
  "word": "exhaust velocity"
}