"bottom sheet" meaning in English

{
  "forms": [
    {
      "form": "bottom sheets",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "bottom sheet (plural bottom sheets)",
      "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": "English entries with topic categories using raw markup",
          "parents": [
            "Entries with topic categories using raw markup",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "English terms with non-redundant non-automated sortkeys",
          "parents": [
            "Terms with non-redundant non-automated sortkeys",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Bedding",
          "orig": "en:Bedding",
          "parents": [
            "Home",
            "Society",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "A bed sheet used to cover a mattress, i.e. the sheet that one typically lies on."
      ],
      "id": "en-bottom_sheet-en-noun-ra0PP9oZ",
      "links": [
        [
          "bed sheet",
          "bed sheet"
        ],
        [
          "mattress",
          "mattress#English"
        ]
      ],
      "related": [
        {
          "word": "fitted sheet"
        },
        {
          "word": "top sheet"
        },
        {
          "word": "breathable"
        },
        {
          "word": "mattress"
        },
        {
          "word": "thermoadaptable"
        },
        {
          "word": "waterproof"
        }
      ],
      "translations": [
        {
          "code": "fi",
          "lang": "Finnish",
          "sense": "bottom bed sheet",
          "word": "aluslakana"
        },
        {
          "code": "it",
          "lang": "Italian",
          "sense": "bottom bed sheet",
          "tags": [
            "masculine"
          ],
          "word": "lenzuolo con angoli"
        },
        {
          "code": "es",
          "lang": "Spanish",
          "sense": "bottom bed sheet",
          "tags": [
            "feminine"
          ],
          "word": "sábana bajera"
        },
        {
          "code": "es",
          "lang": "Spanish",
          "sense": "bottom bed sheet",
          "word": "bajera"
        }
      ]
    }
  ],
  "word": "bottom sheet"
}

{
  "forms": [
    {
      "form": "bottom sheets",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "bottom sheet (plural bottom sheets)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "related": [
    {
      "word": "fitted sheet"
    },
    {
      "word": "top sheet"
    },
    {
      "word": "breathable"
    },
    {
      "word": "mattress"
    },
    {
      "word": "thermoadaptable"
    },
    {
      "word": "waterproof"
    }
  ],
  "senses": [
    {
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English entries with topic categories using raw markup",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "English terms with non-redundant non-automated sortkeys",
        "en:Bedding"
      ],
      "glosses": [
        "A bed sheet used to cover a mattress, i.e. the sheet that one typically lies on."
      ],
      "links": [
        [
          "bed sheet",
          "bed sheet"
        ],
        [
          "mattress",
          "mattress#English"
        ]
      ]
    }
  ],
  "translations": [
    {
      "code": "fi",
      "lang": "Finnish",
      "sense": "bottom bed sheet",
      "word": "aluslakana"
    },
    {
      "code": "it",
      "lang": "Italian",
      "sense": "bottom bed sheet",
      "tags": [
        "masculine"
      ],
      "word": "lenzuolo con angoli"
    },
    {
      "code": "es",
      "lang": "Spanish",
      "sense": "bottom bed sheet",
      "tags": [
        "feminine"
      ],
      "word": "sábana bajera"
    },
    {
      "code": "es",
      "lang": "Spanish",
      "sense": "bottom bed sheet",
      "word": "bajera"
    }
  ],
  "word": "bottom sheet"
}