"flatten down" meaning in English

{
  "forms": [
    {
      "form": "flattens down",
      "tags": [
        "present",
        "singular",
        "third-person"
      ]
    },
    {
      "form": "flattening down",
      "tags": [
        "participle",
        "present"
      ]
    },
    {
      "form": "flattened down",
      "tags": [
        "participle",
        "past"
      ]
    },
    {
      "form": "flattened down",
      "tags": [
        "past"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "*"
      },
      "expansion": "flatten down (third-person singular simple present flattens down, present participle flattening down, simple past and past participle flattened down)",
      "name": "en-verb"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "verb",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "English phrasal verbs formed with \"down\"",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        }
      ],
      "glosses": [
        "To become or make (something) flat."
      ],
      "id": "en-flatten_down-en-verb-DbnBhAKf",
      "raw_glosses": [
        "(informal, transitive, intransitive) To become or make (something) flat."
      ],
      "tags": [
        "informal",
        "intransitive",
        "transitive"
      ]
    }
  ],
  "word": "flatten down"
}

{
  "forms": [
    {
      "form": "flattens down",
      "tags": [
        "present",
        "singular",
        "third-person"
      ]
    },
    {
      "form": "flattening down",
      "tags": [
        "participle",
        "present"
      ]
    },
    {
      "form": "flattened down",
      "tags": [
        "participle",
        "past"
      ]
    },
    {
      "form": "flattened down",
      "tags": [
        "past"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "*"
      },
      "expansion": "flatten down (third-person singular simple present flattens down, present participle flattening down, simple past and past participle flattened down)",
      "name": "en-verb"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "verb",
  "senses": [
    {
      "categories": [
        "English entries with incorrect language header",
        "English informal terms",
        "English intransitive verbs",
        "English lemmas",
        "English multiword terms",
        "English phrasal verbs",
        "English phrasal verbs formed with \"down\"",
        "English transitive verbs",
        "English verbs",
        "Pages with 1 entry",
        "Pages with entries"
      ],
      "glosses": [
        "To become or make (something) flat."
      ],
      "raw_glosses": [
        "(informal, transitive, intransitive) To become or make (something) flat."
      ],
      "tags": [
        "informal",
        "intransitive",
        "transitive"
      ]
    }
  ],
  "word": "flatten down"
}