"perfect square" meaning in English

{
  "forms": [
    {
      "form": "perfect squares",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "perfect square (plural perfect squares)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Numbers",
          "orig": "en:Numbers",
          "parents": [
            "All topics",
            "Terms by semantic function",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "Synonym of square number"
      ],
      "id": "en-perfect_square-en-noun-fAgf1tZq",
      "links": [
        [
          "square number",
          "square number#English"
        ]
      ],
      "related": [
        {
          "word": "perfect cube"
        },
        {
          "word": "perfect power"
        }
      ],
      "synonyms": [
        {
          "tags": [
            "synonym",
            "synonym-of"
          ],
          "word": "square number"
        }
      ]
    }
  ],
  "word": "perfect square"
}

{
  "forms": [
    {
      "form": "perfect squares",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "perfect square (plural perfect squares)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "related": [
    {
      "word": "perfect cube"
    },
    {
      "word": "perfect power"
    }
  ],
  "senses": [
    {
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "en:Numbers"
      ],
      "glosses": [
        "Synonym of square number"
      ],
      "links": [
        [
          "square number",
          "square number#English"
        ]
      ],
      "synonyms": [
        {
          "tags": [
            "synonym",
            "synonym-of"
          ],
          "word": "square number"
        }
      ]
    }
  ],
  "word": "perfect square"
}