"topnotch" meaning in English

{
  "forms": [
    {
      "form": "more topnotch",
      "tags": [
        "comparative"
      ]
    },
    {
      "form": "most topnotch",
      "tags": [
        "superlative"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "topnotch (comparative more topnotch, superlative most topnotch)",
      "name": "en-adj"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "adj",
  "senses": [
    {
      "alt_of": [
        {
          "extra": "of the highest level",
          "word": "top notch"
        }
      ],
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        }
      ],
      "examples": [
        {
          "text": "That was a topnotch performance!",
          "type": "example"
        }
      ],
      "glosses": [
        "Alternative form of top notch (“of the highest level”)"
      ],
      "id": "en-topnotch-en-adj-Q1EzXN~I",
      "links": [
        [
          "top notch",
          "top notch#English"
        ]
      ],
      "tags": [
        "alt-of",
        "alternative"
      ]
    }
  ],
  "word": "topnotch"
}

{
  "forms": [
    {
      "form": "more topnotch",
      "tags": [
        "comparative"
      ]
    },
    {
      "form": "most topnotch",
      "tags": [
        "superlative"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "topnotch (comparative more topnotch, superlative most topnotch)",
      "name": "en-adj"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "adj",
  "senses": [
    {
      "alt_of": [
        {
          "extra": "of the highest level",
          "word": "top notch"
        }
      ],
      "categories": [
        "English adjectives",
        "English entries with incorrect language header",
        "English lemmas",
        "English terms with usage examples",
        "Pages with 1 entry"
      ],
      "examples": [
        {
          "text": "That was a topnotch performance!",
          "type": "example"
        }
      ],
      "glosses": [
        "Alternative form of top notch (“of the highest level”)"
      ],
      "links": [
        [
          "top notch",
          "top notch#English"
        ]
      ],
      "tags": [
        "alt-of",
        "alternative"
      ]
    }
  ],
  "word": "topnotch"
}