"α-Centauri" meaning in English

{
  "etymology_text": "α (brightest) + Centauri (a star in that constellation)",
  "head_templates": [
    {
      "args": {},
      "expansion": "α-Centauri",
      "name": "en-proper noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "name",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "English terms written in multiple scripts",
          "parents": [
            "Terms written in multiple scripts",
            "Terms by orthographic property",
            "Terms by lexical property"
          ],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Stars",
          "orig": "en:Stars",
          "parents": [
            "Celestial bodies",
            "Space",
            "Nature",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "The brightest star system in the southern constellation of Centaurus."
      ],
      "id": "en-α-Centauri-en-name-K1rWfFtE",
      "links": [
        [
          "astronomy",
          "astronomy"
        ],
        [
          "Centaurus",
          "Centaurus"
        ]
      ],
      "raw_glosses": [
        "(astronomy) The brightest star system in the southern constellation of Centaurus."
      ],
      "synonyms": [
        {
          "word": "Alpha Centauri"
        }
      ],
      "topics": [
        "astronomy",
        "natural-sciences"
      ],
      "wikipedia": [
        "α-Centauri"
      ]
    }
  ],
  "word": "α-Centauri"
}

{
  "etymology_text": "α (brightest) + Centauri (a star in that constellation)",
  "head_templates": [
    {
      "args": {},
      "expansion": "α-Centauri",
      "name": "en-proper noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "name",
  "senses": [
    {
      "categories": [
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English proper nouns",
        "English terms spelled with Α",
        "English terms written in multiple scripts",
        "English uncountable nouns",
        "en:Stars"
      ],
      "glosses": [
        "The brightest star system in the southern constellation of Centaurus."
      ],
      "links": [
        [
          "astronomy",
          "astronomy"
        ],
        [
          "Centaurus",
          "Centaurus"
        ]
      ],
      "raw_glosses": [
        "(astronomy) The brightest star system in the southern constellation of Centaurus."
      ],
      "topics": [
        "astronomy",
        "natural-sciences"
      ],
      "wikipedia": [
        "α-Centauri"
      ]
    }
  ],
  "synonyms": [
    {
      "word": "Alpha Centauri"
    }
  ],
  "word": "α-Centauri"
}