"sesquicentenary" meaning in English

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "sesqui",
        "3": "centenary",
        "t1": "one and a half",
        "t2": "100 year anniversary"
      },
      "expansion": "sesqui- (“one and a half”) + centenary (“100 year anniversary”)",
      "name": "prefix"
    }
  ],
  "etymology_text": "From sesqui- (“one and a half”) + centenary (“100 year anniversary”).",
  "forms": [
    {
      "form": "sesquicentenaries",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "sesquicentenary (plural sesquicentenaries)",
      "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": "English terms prefixed with sesqui-",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Entries with translation boxes",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Terms with German translations",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Terms with Russian translations",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Calendar",
          "orig": "en:Calendar",
          "parents": [
            "Timekeeping",
            "Time",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "A 150-year anniversary."
      ],
      "id": "en-sesquicentenary-en-noun-3lFEzxsu",
      "links": [
        [
          "anniversary",
          "anniversary"
        ]
      ],
      "related": [
        {
          "word": "sesquicentenarian"
        },
        {
          "word": "sesquicentennial"
        }
      ],
      "translations": [
        {
          "code": "de",
          "lang": "German",
          "sense": "a 150 year anniversary",
          "tags": [
            "feminine"
          ],
          "word": "Hundertfünfzigjahrfeier"
        },
        {
          "code": "de",
          "lang": "German",
          "sense": "a 150 year anniversary",
          "tags": [
            "neuter"
          ],
          "word": "hundertfünfzigjähriges Jubiläum"
        },
        {
          "code": "ru",
          "lang": "Russian",
          "roman": "polutoravekovoj jubiléj",
          "sense": "a 150 year anniversary",
          "tags": [
            "masculine"
          ],
          "word": "полуторавековой юбиле́й"
        },
        {
          "code": "ru",
          "lang": "Russian",
          "roman": "stopjatidesjatiletije",
          "sense": "a 150 year anniversary",
          "tags": [
            "neuter"
          ],
          "word": "стопятидесятилетие"
        }
      ]
    }
  ],
  "word": "sesquicentenary"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "sesqui",
        "3": "centenary",
        "t1": "one and a half",
        "t2": "100 year anniversary"
      },
      "expansion": "sesqui- (“one and a half”) + centenary (“100 year anniversary”)",
      "name": "prefix"
    }
  ],
  "etymology_text": "From sesqui- (“one and a half”) + centenary (“100 year anniversary”).",
  "forms": [
    {
      "form": "sesquicentenaries",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "sesquicentenary (plural sesquicentenaries)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "related": [
    {
      "word": "sesquicentenarian"
    },
    {
      "word": "sesquicentennial"
    }
  ],
  "senses": [
    {
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English nouns",
        "English terms prefixed with sesqui-",
        "Entries with translation boxes",
        "Pages with 1 entry",
        "Pages with entries",
        "Terms with German translations",
        "Terms with Russian translations",
        "en:Calendar"
      ],
      "glosses": [
        "A 150-year anniversary."
      ],
      "links": [
        [
          "anniversary",
          "anniversary"
        ]
      ]
    }
  ],
  "translations": [
    {
      "code": "de",
      "lang": "German",
      "sense": "a 150 year anniversary",
      "tags": [
        "feminine"
      ],
      "word": "Hundertfünfzigjahrfeier"
    },
    {
      "code": "de",
      "lang": "German",
      "sense": "a 150 year anniversary",
      "tags": [
        "neuter"
      ],
      "word": "hundertfünfzigjähriges Jubiläum"
    },
    {
      "code": "ru",
      "lang": "Russian",
      "roman": "polutoravekovoj jubiléj",
      "sense": "a 150 year anniversary",
      "tags": [
        "masculine"
      ],
      "word": "полуторавековой юбиле́й"
    },
    {
      "code": "ru",
      "lang": "Russian",
      "roman": "stopjatidesjatiletije",
      "sense": "a 150 year anniversary",
      "tags": [
        "neuter"
      ],
      "word": "стопятидесятилетие"
    }
  ],
  "word": "sesquicentenary"
}