"FIR" meaning in Anglais

{
  "antonyms": [
    {
      "translation": "infinite impulse response",
      "word": "IIR"
    }
  ],
  "categories": [
    {
      "kind": "other",
      "name": "Lemmes en anglais",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "Noms communs en anglais",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "Sigles en anglais",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "Anglais",
      "orig": "anglais",
      "parents": [],
      "source": "w"
    }
  ],
  "etymology_texts": [
    "(Sigle) Initiales de finite impulse response."
  ],
  "lang": "Anglais",
  "lang_code": "en",
  "pos": "noun",
  "pos_title": "Nom commun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Lexique en anglais de l’électronique",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Wiktionnaire:Exemples manquants en anglais",
          "parents": [],
          "source": "w"
        }
      ],
      "glosses": [
        "RIF, réponse impulsionnelle finie."
      ],
      "id": "fr-FIR-en-noun-6Je7LYiQ",
      "topics": [
        "electricity"
      ]
    },
    {
      "categories": [
        {
          "kind": "other",
          "name": "Métonymies en anglais",
          "parents": [],
          "source": "w"
        }
      ],
      "glosses": [
        "Filtre à réponse impulsionnelle finie."
      ],
      "id": "fr-FIR-en-noun-gWsjhdJd",
      "tags": [
        "metonymically"
      ]
    }
  ],
  "word": "FIR"
}

{
  "antonyms": [
    {
      "translation": "infinite impulse response",
      "word": "IIR"
    }
  ],
  "categories": [
    "Lemmes en anglais",
    "Noms communs en anglais",
    "Sigles en anglais",
    "anglais"
  ],
  "etymology_texts": [
    "(Sigle) Initiales de finite impulse response."
  ],
  "lang": "Anglais",
  "lang_code": "en",
  "pos": "noun",
  "pos_title": "Nom commun",
  "senses": [
    {
      "categories": [
        "Lexique en anglais de l’électronique",
        "Wiktionnaire:Exemples manquants en anglais"
      ],
      "glosses": [
        "RIF, réponse impulsionnelle finie."
      ],
      "topics": [
        "electricity"
      ]
    },
    {
      "categories": [
        "Métonymies en anglais"
      ],
      "glosses": [
        "Filtre à réponse impulsionnelle finie."
      ],
      "tags": [
        "metonymically"
      ]
    }
  ],
  "word": "FIR"
}