"plainchant" meaning in English

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "fr",
        "3": "plain-chant"
      },
      "expansion": "French plain-chant",
      "name": "bor"
    },
    {
      "args": {
        "1": "en",
        "2": "plain",
        "3": "chant"
      },
      "expansion": "plain + chant",
      "name": "compound"
    },
    {
      "args": {
        "1": "en",
        "2": "la",
        "3": "cantus planus",
        "nocap": "1"
      },
      "expansion": "calque of Latin cantus planus",
      "name": "calque"
    }
  ],
  "etymology_text": "From French plain-chant, from plain + chant, calque of Latin cantus planus.",
  "forms": [
    {
      "form": "plainchants",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "~"
      },
      "expansion": "plainchant (countable and uncountable, plural plainchants)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "Synonym of plainsong"
      ],
      "id": "en-plainchant-en-noun-qmDAdrvG",
      "links": [
        [
          "plainsong",
          "plainsong#English"
        ]
      ],
      "synonyms": [
        {
          "tags": [
            "synonym",
            "synonym-of"
          ],
          "word": "plainsong"
        }
      ],
      "tags": [
        "countable",
        "uncountable"
      ]
    }
  ],
  "word": "plainchant"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "fr",
        "3": "plain-chant"
      },
      "expansion": "French plain-chant",
      "name": "bor"
    },
    {
      "args": {
        "1": "en",
        "2": "plain",
        "3": "chant"
      },
      "expansion": "plain + chant",
      "name": "compound"
    },
    {
      "args": {
        "1": "en",
        "2": "la",
        "3": "cantus planus",
        "nocap": "1"
      },
      "expansion": "calque of Latin cantus planus",
      "name": "calque"
    }
  ],
  "etymology_text": "From French plain-chant, from plain + chant, calque of Latin cantus planus.",
  "forms": [
    {
      "form": "plainchants",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "~"
      },
      "expansion": "plainchant (countable and uncountable, plural plainchants)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "English compound terms",
        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English nouns",
        "English terms borrowed from French",
        "English terms calqued from Latin",
        "English terms derived from French",
        "English terms derived from Latin",
        "English uncountable nouns"
      ],
      "glosses": [
        "Synonym of plainsong"
      ],
      "links": [
        [
          "plainsong",
          "plainsong#English"
        ]
      ],
      "synonyms": [
        {
          "tags": [
            "synonym",
            "synonym-of"
          ],
          "word": "plainsong"
        }
      ],
      "tags": [
        "countable",
        "uncountable"
      ]
    }
  ],
  "word": "plainchant"
}