"brain trick" meaning in English

{
  "forms": [
    {
      "form": "brain tricks",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "brain trick (plural brain tricks)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "_dis": "52 10 39",
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w+disamb"
        },
        {
          "_dis": "67 9 24",
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w+disamb"
        },
        {
          "_dis": "78 6 16",
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w+disamb"
        }
      ],
      "examples": [
        {
          "ref": "1613, John Marston, William Barksted, The Insatiate Countess, III.4:",
          "text": "But do I not know these are but brain-tricks?",
          "type": "quote"
        }
      ],
      "glosses": [
        "A stratagem, a clever trick; a ruse."
      ],
      "id": "en-brain_trick-en-noun-gso528et",
      "links": [
        [
          "stratagem",
          "stratagem"
        ],
        [
          "ruse",
          "ruse"
        ]
      ],
      "raw_glosses": [
        "(obsolete) A stratagem, a clever trick; a ruse."
      ],
      "tags": [
        "obsolete"
      ]
    },
    {
      "glosses": [
        "A delusion; a trick of the brain."
      ],
      "id": "en-brain_trick-en-noun-fqQGPL8c",
      "links": [
        [
          "delusion",
          "delusion"
        ]
      ]
    },
    {
      "glosses": [
        "A puzzle designed to exercise the brain."
      ],
      "id": "en-brain_trick-en-noun-DL0a1iH6",
      "links": [
        [
          "puzzle",
          "puzzle"
        ]
      ]
    }
  ],
  "word": "brain trick"
}

{
  "categories": [
    "English countable nouns",
    "English entries with incorrect language header",
    "English lemmas",
    "English multiword terms",
    "English nouns",
    "Pages with 1 entry",
    "Pages with entries"
  ],
  "forms": [
    {
      "form": "brain tricks",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "brain trick (plural brain tricks)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "English terms with obsolete senses",
        "English terms with quotations",
        "Quotation templates to be cleaned"
      ],
      "examples": [
        {
          "ref": "1613, John Marston, William Barksted, The Insatiate Countess, III.4:",
          "text": "But do I not know these are but brain-tricks?",
          "type": "quote"
        }
      ],
      "glosses": [
        "A stratagem, a clever trick; a ruse."
      ],
      "links": [
        [
          "stratagem",
          "stratagem"
        ],
        [
          "ruse",
          "ruse"
        ]
      ],
      "raw_glosses": [
        "(obsolete) A stratagem, a clever trick; a ruse."
      ],
      "tags": [
        "obsolete"
      ]
    },
    {
      "glosses": [
        "A delusion; a trick of the brain."
      ],
      "links": [
        [
          "delusion",
          "delusion"
        ]
      ]
    },
    {
      "glosses": [
        "A puzzle designed to exercise the brain."
      ],
      "links": [
        [
          "puzzle",
          "puzzle"
        ]
      ]
    }
  ],
  "word": "brain trick"
}