"know about" meaning in English

{
  "forms": [
    {
      "form": "knows about",
      "tags": [
        "present",
        "singular",
        "third-person"
      ]
    },
    {
      "form": "knowing about",
      "tags": [
        "participle",
        "present"
      ]
    },
    {
      "form": "knew about",
      "tags": [
        "past"
      ]
    },
    {
      "form": "known about",
      "tags": [
        "participle",
        "past"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "know<,,knew,known> about"
      },
      "expansion": "know about (third-person singular simple present knows about, present participle knowing about, simple past knew about, past participle known about)",
      "name": "en-verb"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "verb",
  "senses": [
    {
      "glosses": [
        "Used other than figuratively or idiomatically: see know, about."
      ],
      "id": "en-know_about-en-verb-Grcr-HnE",
      "links": [
        [
          "know",
          "know#English"
        ],
        [
          "about",
          "about#English"
        ]
      ]
    },
    {
      "categories": [
        {
          "_dis": "12 88",
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w+disamb"
        },
        {
          "_dis": "24 76",
          "kind": "other",
          "name": "English phrasal verbs formed with \"about\"",
          "parents": [],
          "source": "w+disamb"
        },
        {
          "_dis": "20 80",
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w+disamb"
        }
      ],
      "examples": [
        {
          "text": "I don't know about him.",
          "type": "example"
        },
        {
          "text": "You never know about that family.",
          "type": "example"
        }
      ],
      "glosses": [
        "To have positive inclinations regarding (someone or something); to have no doubts regarding (someone or something)."
      ],
      "id": "en-know_about-en-verb-I7UBo-Dz",
      "raw_glosses": [
        "(informal, usually negative) To have positive inclinations regarding (someone or something); to have no doubts regarding (someone or something)."
      ],
      "tags": [
        "informal",
        "negative",
        "usually"
      ]
    }
  ],
  "word": "know about"
}

{
  "categories": [
    "English entries with incorrect language header",
    "English lemmas",
    "English multiword terms",
    "English phrasal verbs",
    "English phrasal verbs formed with \"about\"",
    "English verbs",
    "Pages with 1 entry"
  ],
  "forms": [
    {
      "form": "knows about",
      "tags": [
        "present",
        "singular",
        "third-person"
      ]
    },
    {
      "form": "knowing about",
      "tags": [
        "participle",
        "present"
      ]
    },
    {
      "form": "knew about",
      "tags": [
        "past"
      ]
    },
    {
      "form": "known about",
      "tags": [
        "participle",
        "past"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "know<,,knew,known> about"
      },
      "expansion": "know about (third-person singular simple present knows about, present participle knowing about, simple past knew about, past participle known about)",
      "name": "en-verb"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "verb",
  "senses": [
    {
      "glosses": [
        "Used other than figuratively or idiomatically: see know, about."
      ],
      "links": [
        [
          "know",
          "know#English"
        ],
        [
          "about",
          "about#English"
        ]
      ]
    },
    {
      "categories": [
        "English informal terms",
        "English terms with usage examples"
      ],
      "examples": [
        {
          "text": "I don't know about him.",
          "type": "example"
        },
        {
          "text": "You never know about that family.",
          "type": "example"
        }
      ],
      "glosses": [
        "To have positive inclinations regarding (someone or something); to have no doubts regarding (someone or something)."
      ],
      "raw_glosses": [
        "(informal, usually negative) To have positive inclinations regarding (someone or something); to have no doubts regarding (someone or something)."
      ],
      "tags": [
        "informal",
        "negative",
        "usually"
      ]
    }
  ],
  "word": "know about"
}