"fairweather friend" meaning in English

{
  "forms": [
    {
      "form": "fairweather friends",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "head": "fairweather friend"
      },
      "expansion": "fairweather friend (plural fairweather friends)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "alt_of": [
        {
          "word": "fair-weather friend"
        }
      ],
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        }
      ],
      "examples": [
        {
          "ref": "1844, T[imothy] S[hay] Arthur, chapter VI, in Cecilia Howard: Or, The Young Lady who had Finished Her Education, New York, N.Y.: John Allen, 139 Nassau Street, →OCLC, page 49",
          "text": "She did not even attempt to make a reply, or to ask her fairweather friend to remain; but suffered her to leave the room and the house without a word.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "Alternative form of fair-weather friend."
      ],
      "id": "en-fairweather_friend-en-noun-nKdxUsxi",
      "links": [
        [
          "fair-weather friend",
          "fair-weather friend#English"
        ]
      ],
      "tags": [
        "alt-of",
        "alternative"
      ]
    }
  ],
  "word": "fairweather friend"
}

{
  "forms": [
    {
      "form": "fairweather friends",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "head": "fairweather friend"
      },
      "expansion": "fairweather friend (plural fairweather friends)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "alt_of": [
        {
          "word": "fair-weather friend"
        }
      ],
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "English terms with quotations"
      ],
      "examples": [
        {
          "ref": "1844, T[imothy] S[hay] Arthur, chapter VI, in Cecilia Howard: Or, The Young Lady who had Finished Her Education, New York, N.Y.: John Allen, 139 Nassau Street, →OCLC, page 49",
          "text": "She did not even attempt to make a reply, or to ask her fairweather friend to remain; but suffered her to leave the room and the house without a word.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "Alternative form of fair-weather friend."
      ],
      "links": [
        [
          "fair-weather friend",
          "fair-weather friend#English"
        ]
      ],
      "tags": [
        "alt-of",
        "alternative"
      ]
    }
  ],
  "word": "fairweather friend"
}