"edge case" meaning in English

{
  "forms": [
    {
      "form": "edge cases",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "edge case (plural edge cases)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "glosses": [
        "A problem or situation that occurs only at an extreme (maximum or minimum) operating parameter or under other unusual operating conditions."
      ],
      "id": "en-edge_case-en-noun-IJC33JWw",
      "links": [
        [
          "problem",
          "problem"
        ],
        [
          "situation",
          "situation"
        ],
        [
          "extreme",
          "extreme"
        ],
        [
          "maximum",
          "maximum"
        ],
        [
          "minimum",
          "minimum"
        ],
        [
          "parameter",
          "parameter"
        ],
        [
          "unusual",
          "unusual"
        ],
        [
          "conditions",
          "conditions"
        ]
      ]
    },
    {
      "categories": [
        {
          "_dis": "32 68",
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w+disamb"
        }
      ],
      "examples": [
        {
          "ref": "2010, Charles Edge, William Barker, Beau Hunter, Gene Sullivan, Ken Barker, Enterprise Mac Security: Mac OS X Snow Leopard, Apress, page 96",
          "text": "The first thing to do is analyze the situation and determine whether the need to provide additional use is an edge case, or if it will become a common use-case scenario.",
          "type": "quotation"
        },
        {
          "ref": "2012, Bill Wilder, Cloud Architecture Patterns, \"O'Reilly Media, Inc.\", page 32",
          "text": "One edge case is when the code processing the message has not finished, but the invisibility window lapses, and another copy of the same message gets dequeued. At this point, there are two active copies of that message being processed.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "Any unexpected input or user behaviour."
      ],
      "id": "en-edge_case-en-noun-YpCUamX-",
      "links": [
        [
          "unexpected",
          "unexpected"
        ],
        [
          "input",
          "input"
        ],
        [
          "user",
          "user"
        ],
        [
          "behaviour",
          "behaviour"
        ]
      ],
      "raw_glosses": [
        "(loosely) Any unexpected input or user behaviour."
      ],
      "related": [
        {
          "_dis1": "0 100",
          "word": "limit case"
        }
      ],
      "synonyms": [
        {
          "word": "corner case"
        }
      ],
      "tags": [
        "broadly"
      ],
      "translations": [
        {
          "_dis1": "28 72",
          "code": "sv",
          "lang": "Swedish",
          "sense": "Translations",
          "tags": [
            "neuter"
          ],
          "word": "gränsfall"
        }
      ]
    }
  ],
  "word": "edge case"
}

{
  "categories": [
    "English countable nouns",
    "English entries with incorrect language header",
    "English lemmas",
    "English multiword terms",
    "English nouns",
    "Requests for attention concerning English",
    "Translation table header lacks gloss"
  ],
  "forms": [
    {
      "form": "edge cases",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "edge case (plural edge cases)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "related": [
    {
      "word": "limit case"
    }
  ],
  "senses": [
    {
      "glosses": [
        "A problem or situation that occurs only at an extreme (maximum or minimum) operating parameter or under other unusual operating conditions."
      ],
      "links": [
        [
          "problem",
          "problem"
        ],
        [
          "situation",
          "situation"
        ],
        [
          "extreme",
          "extreme"
        ],
        [
          "maximum",
          "maximum"
        ],
        [
          "minimum",
          "minimum"
        ],
        [
          "parameter",
          "parameter"
        ],
        [
          "unusual",
          "unusual"
        ],
        [
          "conditions",
          "conditions"
        ]
      ]
    },
    {
      "categories": [
        "English terms with quotations"
      ],
      "examples": [
        {
          "ref": "2010, Charles Edge, William Barker, Beau Hunter, Gene Sullivan, Ken Barker, Enterprise Mac Security: Mac OS X Snow Leopard, Apress, page 96",
          "text": "The first thing to do is analyze the situation and determine whether the need to provide additional use is an edge case, or if it will become a common use-case scenario.",
          "type": "quotation"
        },
        {
          "ref": "2012, Bill Wilder, Cloud Architecture Patterns, \"O'Reilly Media, Inc.\", page 32",
          "text": "One edge case is when the code processing the message has not finished, but the invisibility window lapses, and another copy of the same message gets dequeued. At this point, there are two active copies of that message being processed.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "Any unexpected input or user behaviour."
      ],
      "links": [
        [
          "unexpected",
          "unexpected"
        ],
        [
          "input",
          "input"
        ],
        [
          "user",
          "user"
        ],
        [
          "behaviour",
          "behaviour"
        ]
      ],
      "raw_glosses": [
        "(loosely) Any unexpected input or user behaviour."
      ],
      "synonyms": [
        {
          "word": "corner case"
        }
      ],
      "tags": [
        "broadly"
      ]
    }
  ],
  "translations": [
    {
      "code": "sv",
      "lang": "Swedish",
      "sense": "Translations",
      "tags": [
        "neuter"
      ],
      "word": "gränsfall"
    }
  ],
  "word": "edge case"
}