"perspective linéaire" meaning in French

{
  "forms": [
    {
      "form": "perspectives linéaires",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "f",
        "2": "-",
        "3": "+"
      },
      "expansion": "perspective linéaire f (usually uncountable, plural perspectives linéaires)",
      "name": "fr-noun"
    }
  ],
  "lang": "French",
  "lang_code": "fr",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "French entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        }
      ],
      "glosses": [
        "linear perspective"
      ],
      "id": "en-perspective_linéaire-fr-noun-0FiDeEjq",
      "links": [
        [
          "linear perspective",
          "linear perspective"
        ]
      ],
      "related": [
        {
          "word": "perspective cavalière"
        }
      ],
      "synonyms": [
        {
          "word": "perspective conique"
        }
      ],
      "tags": [
        "feminine",
        "uncountable",
        "usually"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/pɛʁ.spɛk.tiv li.ne.ɛʁ/"
    }
  ],
  "word": "perspective linéaire"
}

{
  "forms": [
    {
      "form": "perspectives linéaires",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "f",
        "2": "-",
        "3": "+"
      },
      "expansion": "perspective linéaire f (usually uncountable, plural perspectives linéaires)",
      "name": "fr-noun"
    }
  ],
  "lang": "French",
  "lang_code": "fr",
  "pos": "noun",
  "related": [
    {
      "word": "perspective cavalière"
    }
  ],
  "senses": [
    {
      "categories": [
        "French countable nouns",
        "French entries with incorrect language header",
        "French feminine nouns",
        "French lemmas",
        "French multiword terms",
        "French nouns",
        "French nouns with red links in their headword lines",
        "French terms with IPA pronunciation",
        "French uncountable nouns",
        "Pages with 1 entry",
        "Pages with entries"
      ],
      "glosses": [
        "linear perspective"
      ],
      "links": [
        [
          "linear perspective",
          "linear perspective"
        ]
      ],
      "synonyms": [
        {
          "word": "perspective conique"
        }
      ],
      "tags": [
        "feminine",
        "uncountable",
        "usually"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/pɛʁ.spɛk.tiv li.ne.ɛʁ/"
    }
  ],
  "word": "perspective linéaire"
}