"modifier" meaning in English

{
  "categories": [
    {
      "kind": "other",
      "name": "Λέξεις με επίθημα -er (αγγλικά)",
      "parents": [],
      "source": "w"
    }
  ],
  "etymology_text": ": modifier < modify + -er",
  "forms": [
    {
      "form": "modifier"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "related": [
    {
      "word": "modification"
    },
    {
      "word": "modify"
    },
    {
      "word": "access modifier"
    },
    {
      "word": "specifier"
    },
    {
      "word": "modifier key"
    },
    {
      "word": "type modifier"
    }
  ],
  "senses": [
    {
      "glosses": [
        "τροποποιητής"
      ],
      "id": "el-modifier-en-noun-1PVYn6WQ"
    },
    {
      "categories": [
        {
          "kind": "other",
          "name": "Προγραμματισμός (αγγλικά)",
          "parents": [],
          "source": "w"
        }
      ],
      "glosses": [
        "ο τροποποιητής εντολής, κώδικα, κλπ"
      ],
      "id": "el-modifier-en-noun-3Ub6jo4h",
      "raw_tags": [
        "προγραμματισμός"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "ˈmɒdɪfaɪə"
    }
  ],
  "synonyms": [
    {
      "word": "qualifier"
    }
  ],
  "word": "modifier"
}

{
  "categories": [
    "Λέξεις με επίθημα -er (αγγλικά)"
  ],
  "etymology_text": ": modifier < modify + -er",
  "forms": [
    {
      "form": "modifier"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "related": [
    {
      "word": "modification"
    },
    {
      "word": "modify"
    },
    {
      "word": "access modifier"
    },
    {
      "word": "specifier"
    },
    {
      "word": "modifier key"
    },
    {
      "word": "type modifier"
    }
  ],
  "senses": [
    {
      "glosses": [
        "τροποποιητής"
      ]
    },
    {
      "categories": [
        "Προγραμματισμός (αγγλικά)"
      ],
      "glosses": [
        "ο τροποποιητής εντολής, κώδικα, κλπ"
      ],
      "raw_tags": [
        "προγραμματισμός"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "ˈmɒdɪfaɪə"
    }
  ],
  "synonyms": [
    {
      "word": "qualifier"
    }
  ],
  "word": "modifier"
}