"manipulation" meaning in English

{
  "forms": [
    {
      "form": "manipulation"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "related": [
    {
      "word": "manipulate"
    }
  ],
  "senses": [
    {
      "glosses": [
        "ο χειρισμός"
      ],
      "id": "el-manipulation-en-noun-kUzgS3My"
    },
    {
      "glosses": [
        "το τέχνασμα, η χειραγώγηση"
      ],
      "id": "el-manipulation-en-noun-q0cAR0ot"
    }
  ],
  "word": "manipulation"
}

{
  "forms": [
    {
      "form": "manipulation"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "related": [
    {
      "word": "manipulate"
    }
  ],
  "senses": [
    {
      "glosses": [
        "ο χειρισμός"
      ]
    },
    {
      "glosses": [
        "το τέχνασμα, η χειραγώγηση"
      ]
    }
  ],
  "word": "manipulation"
}