"best efforts" meaning in English

{
  "forms": [
    {
      "form": "best effort",
      "tags": [
        "singular"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "p",
        "sg": "best effort"
      },
      "expansion": "best efforts pl (normally plural, singular best effort)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Law",
          "orig": "en:Law",
          "parents": [
            "Justice",
            "Society",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        },
        {
          "_dis": "49 51",
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w+disamb"
        },
        {
          "_dis": "50 50",
          "kind": "other",
          "name": "English pluralia tantum",
          "parents": [
            "Pluralia tantum",
            "Nouns",
            "Lemmas"
          ],
          "source": "w+disamb"
        },
        {
          "_dis": "51 49",
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w+disamb"
        },
        {
          "_dis": "50 50",
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w+disamb"
        }
      ],
      "glosses": [
        "An assurance of good-faith effort to achieve best results under prevailing circumstances."
      ],
      "id": "en-best_efforts-en-noun-Z-DrLx0M",
      "links": [
        [
          "law",
          "law#English"
        ],
        [
          "good-faith",
          "good faith"
        ]
      ],
      "raw_glosses": [
        "(law) An assurance of good-faith effort to achieve best results under prevailing circumstances."
      ],
      "tags": [
        "plural",
        "plural-normally"
      ],
      "topics": [
        "law"
      ]
    },
    {
      "categories": [
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Finance",
          "orig": "en:Finance",
          "parents": [
            "Business",
            "Economics",
            "Society",
            "Social sciences",
            "All topics",
            "Sciences",
            "Fundamental"
          ],
          "source": "w"
        },
        {
          "_dis": "49 51",
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w+disamb"
        },
        {
          "_dis": "50 50",
          "kind": "other",
          "name": "English pluralia tantum",
          "parents": [
            "Pluralia tantum",
            "Nouns",
            "Lemmas"
          ],
          "source": "w+disamb"
        },
        {
          "_dis": "51 49",
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w+disamb"
        },
        {
          "_dis": "50 50",
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w+disamb"
        }
      ],
      "glosses": [
        "An effort to sell securities without a firm underwriting."
      ],
      "id": "en-best_efforts-en-noun-90XCa2Ah",
      "links": [
        [
          "finance",
          "finance#Noun"
        ],
        [
          "underwriting",
          "underwriting"
        ]
      ],
      "raw_glosses": [
        "(finance) An effort to sell securities without a firm underwriting."
      ],
      "tags": [
        "plural",
        "plural-normally"
      ],
      "topics": [
        "business",
        "finance"
      ]
    }
  ],
  "synonyms": [
    {
      "_dis1": "55 45",
      "word": "best endeavors"
    }
  ],
  "word": "best efforts"
}

{
  "categories": [
    "English entries with incorrect language header",
    "English lemmas",
    "English multiword terms",
    "English nouns",
    "English pluralia tantum",
    "Pages with 1 entry",
    "Pages with entries"
  ],
  "forms": [
    {
      "form": "best effort",
      "tags": [
        "singular"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "p",
        "sg": "best effort"
      },
      "expansion": "best efforts pl (normally plural, singular best effort)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "en:Law"
      ],
      "glosses": [
        "An assurance of good-faith effort to achieve best results under prevailing circumstances."
      ],
      "links": [
        [
          "law",
          "law#English"
        ],
        [
          "good-faith",
          "good faith"
        ]
      ],
      "raw_glosses": [
        "(law) An assurance of good-faith effort to achieve best results under prevailing circumstances."
      ],
      "tags": [
        "plural",
        "plural-normally"
      ],
      "topics": [
        "law"
      ]
    },
    {
      "categories": [
        "en:Finance"
      ],
      "glosses": [
        "An effort to sell securities without a firm underwriting."
      ],
      "links": [
        [
          "finance",
          "finance#Noun"
        ],
        [
          "underwriting",
          "underwriting"
        ]
      ],
      "raw_glosses": [
        "(finance) An effort to sell securities without a firm underwriting."
      ],
      "tags": [
        "plural",
        "plural-normally"
      ],
      "topics": [
        "business",
        "finance"
      ]
    }
  ],
  "synonyms": [
    {
      "word": "best endeavors"
    }
  ],
  "word": "best efforts"
}