"a tad" meaning in English

{
  "antonyms": [
    {
      "word": "a lot"
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "-"
      },
      "expansion": "a tad (not comparable)",
      "name": "en-adv"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "adv",
  "senses": [
    {
      "categories": [],
      "glosses": [
        "To a small extent; in a small amount."
      ],
      "id": "en-a_tad-en-adv-qUoj2cSF",
      "links": [
        [
          "extent",
          "extent"
        ],
        [
          "amount",
          "amount"
        ]
      ],
      "raw_glosses": [
        "(informal) To a small extent; in a small amount."
      ],
      "tags": [
        "informal",
        "not-comparable"
      ]
    },
    {
      "categories": [
        {
          "_dis": "11 89",
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w+disamb"
        },
        {
          "_dis": "9 91",
          "kind": "other",
          "name": "English entries with language name categories using raw markup",
          "parents": [
            "Entries with language name categories using raw markup",
            "Entry maintenance"
          ],
          "source": "w+disamb"
        },
        {
          "_dis": "6 94",
          "kind": "other",
          "name": "English positive polarity items",
          "parents": [
            "Positive polarity items",
            "Terms by semantic function"
          ],
          "source": "w+disamb"
        },
        {
          "_dis": "10 90",
          "kind": "other",
          "name": "English terms with non-redundant non-automated sortkeys",
          "parents": [
            "Terms with non-redundant non-automated sortkeys",
            "Entry maintenance"
          ],
          "source": "w+disamb"
        }
      ],
      "glosses": [
        "Slightly; rather."
      ],
      "id": "en-a_tad-en-adv-WHgJi2SB",
      "links": [
        [
          "Slightly",
          "slightly"
        ],
        [
          "rather",
          "rather"
        ]
      ],
      "raw_glosses": [
        "(informal) Slightly; rather."
      ],
      "synonyms": [
        {
          "_dis1": "25 75",
          "word": "a bit"
        },
        {
          "_dis1": "25 75",
          "word": "a little"
        },
        {
          "_dis1": "25 75",
          "word": "a little bit"
        },
        {
          "_dis1": "25 75",
          "word": "a mite"
        }
      ],
      "tags": [
        "informal",
        "not-comparable"
      ]
    }
  ],
  "word": "a tad"
}

{
  "antonyms": [
    {
      "word": "a lot"
    }
  ],
  "categories": [
    "English adverbs",
    "English degree adverbs",
    "English entries with incorrect language header",
    "English entries with language name categories using raw markup",
    "English lemmas",
    "English multiword terms",
    "English positive polarity items",
    "English terms with non-redundant non-automated sortkeys",
    "English uncomparable adverbs"
  ],
  "head_templates": [
    {
      "args": {
        "1": "-"
      },
      "expansion": "a tad (not comparable)",
      "name": "en-adv"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "adv",
  "senses": [
    {
      "categories": [
        "English informal terms"
      ],
      "glosses": [
        "To a small extent; in a small amount."
      ],
      "links": [
        [
          "extent",
          "extent"
        ],
        [
          "amount",
          "amount"
        ]
      ],
      "raw_glosses": [
        "(informal) To a small extent; in a small amount."
      ],
      "tags": [
        "informal",
        "not-comparable"
      ]
    },
    {
      "categories": [
        "English informal terms"
      ],
      "glosses": [
        "Slightly; rather."
      ],
      "links": [
        [
          "Slightly",
          "slightly"
        ],
        [
          "rather",
          "rather"
        ]
      ],
      "raw_glosses": [
        "(informal) Slightly; rather."
      ],
      "tags": [
        "informal",
        "not-comparable"
      ]
    }
  ],
  "synonyms": [
    {
      "word": "a bit"
    },
    {
      "word": "a little"
    },
    {
      "word": "a little bit"
    },
    {
      "word": "a mite"
    }
  ],
  "word": "a tad"
}