"all systems go" meaning in English

{
  "etymology_templates": [],
  "etymology_text": "Originally used in the aerospace industry to indicate preparedness to launch.",
  "head_templates": [
    {
      "args": {
        "1": "en",
        "2": "phrase",
        "head": "all systems go"
      },
      "expansion": "all systems go",
      "name": "head"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "phrase",
  "senses": [
    {
      "categories": [
        {
          "kind": "topical",
          "name": "Systems theory",
          "parents": [
            "Sciences",
            "Systems",
            "All topics",
            "Interdisciplinary fields",
            "Society",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "Everything is ready."
      ],
      "id": "all_systems_go-phrase",
      "tags": [
        "informal"
      ],
      "translations": [
        {
          "code": "lv",
          "lang": "Latvian",
          "sense": "everything is ready in the aerospace industry",
          "word": "startam gatavs"
        },
        {
          "code": "pl",
          "lang": "Polish",
          "sense": "everything is ready in the aerospace industry",
          "tags": [
            "plural"
          ],
          "word": "wszystkie systemy sprawne"
        }
      ]
    }
  ],
  "word": "all systems go"
}

{
  "etymology_templates": [],
  "etymology_text": "Originally used in the aerospace industry to indicate preparedness to launch.",
  "head_templates": [
    {
      "args": {
        "1": "en",
        "2": "phrase",
        "head": "all systems go"
      },
      "expansion": "all systems go",
      "name": "head"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "phrase",
  "senses": [
    {
      "categories": [
        "English informal terms",
        "English lemmas",
        "English multiword terms",
        "English phrases",
        "en:Systems theory"
      ],
      "glosses": [
        "Everything is ready."
      ],
      "tags": [
        "informal"
      ]
    }
  ],
  "translations": [
    {
      "code": "lv",
      "lang": "Latvian",
      "sense": "everything is ready in the aerospace industry",
      "word": "startam gatavs"
    },
    {
      "code": "pl",
      "lang": "Polish",
      "sense": "everything is ready in the aerospace industry",
      "tags": [
        "plural"
      ],
      "word": "wszystkie systemy sprawne"
    }
  ],
  "word": "all systems go"
}