"must-read" meaning in English

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "must",
        "3": "read"
      },
      "expansion": "must + read",
      "name": "compound"
    }
  ],
  "etymology_text": "From must + read.",
  "forms": [
    {
      "form": "must-reads",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "must-read (plural must-reads)",
      "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": "Entries with translation boxes",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Japanese terms with redundant script codes",
          "parents": [
            "Terms with redundant script codes",
            "Entry maintenance"
          ],
          "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 Japanese translations",
          "parents": [],
          "source": "w"
        }
      ],
      "glosses": [
        "A book, article, etc. that one is strongly recommended to read."
      ],
      "id": "en-must-read-en-noun--TQ7C~k0",
      "links": [
        [
          "book",
          "book"
        ],
        [
          "article",
          "article"
        ],
        [
          "read",
          "read"
        ]
      ],
      "translations": [
        {
          "code": "fi",
          "lang": "Finnish",
          "note": "no equivalent term in Finnish (the verb lukea (“to read”) is used as part of the standard grammatical structure for expressing need, such as on luettava, on pakko lukea, täytyy lukea, pitää lukea)",
          "sense": "product strongly recommended to read"
        },
        {
          "code": "de",
          "lang": "German",
          "note": "Pflichtlektüre f (which however also means a book which one is not only recommended but required to read, sometimes called set book in English)",
          "sense": "product strongly recommended to read"
        },
        {
          "code": "ja",
          "lang": "Japanese",
          "roman": "hitsudoku",
          "sense": "product strongly recommended to read",
          "word": "必読"
        }
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/mʌst ɹid/"
    }
  ],
  "word": "must-read"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "must",
        "3": "read"
      },
      "expansion": "must + read",
      "name": "compound"
    }
  ],
  "etymology_text": "From must + read.",
  "forms": [
    {
      "form": "must-reads",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "must-read (plural must-reads)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "English compound terms",
        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "Entries with translation boxes",
        "Japanese terms with redundant script codes",
        "Pages with 1 entry",
        "Pages with entries",
        "Terms with German translations",
        "Terms with Japanese translations"
      ],
      "glosses": [
        "A book, article, etc. that one is strongly recommended to read."
      ],
      "links": [
        [
          "book",
          "book"
        ],
        [
          "article",
          "article"
        ],
        [
          "read",
          "read"
        ]
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/mʌst ɹid/"
    }
  ],
  "translations": [
    {
      "code": "fi",
      "lang": "Finnish",
      "note": "no equivalent term in Finnish (the verb lukea (“to read”) is used as part of the standard grammatical structure for expressing need, such as on luettava, on pakko lukea, täytyy lukea, pitää lukea)",
      "sense": "product strongly recommended to read"
    },
    {
      "code": "de",
      "lang": "German",
      "note": "Pflichtlektüre f (which however also means a book which one is not only recommended but required to read, sometimes called set book in English)",
      "sense": "product strongly recommended to read"
    },
    {
      "code": "ja",
      "lang": "Japanese",
      "roman": "hitsudoku",
      "sense": "product strongly recommended to read",
      "word": "必読"
    }
  ],
  "word": "must-read"
}