"hee-hee" meaning in English

{
  "head_templates": [
    {
      "args": {},
      "expansion": "hee-hee",
      "name": "en-interj"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "intj",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
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          "source": "w"
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          "name": "English onomatopoeias",
          "parents": [],
          "source": "w"
        },
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          "kind": "other",
          "name": "English reduplicated coordinated pairs",
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            "Reduplicated coordinated pairs",
            "Coordinated pairs",
            "Reduplications",
            "Terms by etymology"
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          "source": "w"
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          "source": "w"
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          "parents": [],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Laughter",
          "orig": "en:Laughter",
          "parents": [
            "Happiness",
            "Reflexes",
            "Emotions",
            "Human behaviour",
            "Mind",
            "Human",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "A sound of high-pitched laughter"
      ],
      "id": "en-hee-hee-en-intj-BgmDQaaH",
      "links": [
        [
          "onomatopoeia",
          "onomatopoeia"
        ],
        [
          "laughter",
          "laughter"
        ]
      ],
      "raw_glosses": [
        "(onomatopoeia) A sound of high-pitched laughter"
      ],
      "related": [
        {
          "word": "hee"
        },
        {
          "word": "ha"
        },
        {
          "word": "haha"
        }
      ],
      "tags": [
        "onomatopoeic"
      ]
    }
  ],
  "word": "hee-hee"
}

{
  "head_templates": [
    {
      "args": {},
      "expansion": "hee-hee",
      "name": "en-interj"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "intj",
  "related": [
    {
      "word": "hee"
    },
    {
      "word": "ha"
    },
    {
      "word": "haha"
    }
  ],
  "senses": [
    {
      "categories": [
        "English entries with incorrect language header",
        "English interjections",
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        "English multiword terms",
        "English onomatopoeias",
        "English reduplicated coordinated pairs",
        "Pages with 1 entry",
        "Pages with entries",
        "en:Laughter"
      ],
      "glosses": [
        "A sound of high-pitched laughter"
      ],
      "links": [
        [
          "onomatopoeia",
          "onomatopoeia"
        ],
        [
          "laughter",
          "laughter"
        ]
      ],
      "raw_glosses": [
        "(onomatopoeia) A sound of high-pitched laughter"
      ],
      "tags": [
        "onomatopoeic"
      ]
    }
  ],
  "word": "hee-hee"
}