"underflush" meaning in English

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "under",
        "3": "flush"
      },
      "expansion": "under + flush",
      "name": "compound"
    }
  ],
  "etymology_text": "From under + flush.",
  "forms": [
    {
      "form": "underflushes",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "es"
      },
      "expansion": "underflush (plural underflushes)",
      "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"
        },
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        }
      ],
      "examples": [
        {
          "ref": "1938, Norman Lindsay, Age of Consent, 1st Australian edition, Sydney, N.S.W.: Ure Smith, published 1962, →OCLC, page 50:",
          "text": "Honey-coloured all over, with an underflush of vermilion at the cheeks and lips.",
          "type": "quote"
        }
      ],
      "glosses": [
        "A tinge of colour showing through from beneath."
      ],
      "id": "en-underflush-en-noun-P8Wlu--M"
    }
  ],
  "word": "underflush"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "under",
        "3": "flush"
      },
      "expansion": "under + flush",
      "name": "compound"
    }
  ],
  "etymology_text": "From under + flush.",
  "forms": [
    {
      "form": "underflushes",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "es"
      },
      "expansion": "underflush (plural underflushes)",
      "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 with quotations",
        "Pages with 1 entry",
        "Pages with entries"
      ],
      "examples": [
        {
          "ref": "1938, Norman Lindsay, Age of Consent, 1st Australian edition, Sydney, N.S.W.: Ure Smith, published 1962, →OCLC, page 50:",
          "text": "Honey-coloured all over, with an underflush of vermilion at the cheeks and lips.",
          "type": "quote"
        }
      ],
      "glosses": [
        "A tinge of colour showing through from beneath."
      ]
    }
  ],
  "word": "underflush"
}