"subject complement" meaning in English

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "subject",
        "3": "complement"
      },
      "expansion": "subject + complement",
      "name": "com"
    }
  ],
  "etymology_text": "From subject + complement.",
  "forms": [
    {
      "form": "subject complements",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "subject complement (plural subject complements)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Entries with translation boxes",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Terms with Danish translations",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Terms with Japanese translations",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "langcode": "en",
          "name": "Grammar",
          "orig": "en:Grammar",
          "parents": [],
          "source": "w"
        }
      ],
      "examples": [
        {
          "text": "In the sentence \"That is a flying car!\", 'that' is the subject and 'flying car' is the subject complement."
        },
        {
          "text": "In the sentence \"That house seems haunted!\", 'that house' is the subject and 'haunted' is the subject complement (in this case an adjective)."
        }
      ],
      "glosses": [
        "A complement which is coupled to a subject."
      ],
      "id": "en-subject_complement-en-noun-bBjXNmKO",
      "links": [
        [
          "grammar",
          "grammar"
        ],
        [
          "complement",
          "complement"
        ],
        [
          "subject",
          "subject"
        ]
      ],
      "raw_glosses": [
        "(grammar) A complement which is coupled to a subject."
      ],
      "related": [
        {
          "word": "object complement"
        },
        {
          "word": "clausal complement"
        },
        {
          "word": "predicative"
        }
      ],
      "topics": [
        "grammar",
        "human-sciences",
        "linguistics",
        "sciences"
      ],
      "translations": [
        {
          "code": "da",
          "lang": "Danish",
          "lang_code": "da",
          "sense": "subject complement",
          "tags": [
            "neuter"
          ],
          "word": "subjektsprædikat"
        },
        {
          "code": "da",
          "lang": "Danish",
          "lang_code": "da",
          "sense": "subject complement",
          "word": "omsagnsled til grundled"
        },
        {
          "alt": "しゅかくほご",
          "code": "ja",
          "lang": "Japanese",
          "lang_code": "ja",
          "roman": "shukaku-hogo",
          "sense": "subject complement",
          "word": "主格保護"
        }
      ]
    }
  ],
  "word": "subject complement"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "subject",
        "3": "complement"
      },
      "expansion": "subject + complement",
      "name": "com"
    }
  ],
  "etymology_text": "From subject + complement.",
  "forms": [
    {
      "form": "subject complements",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "subject complement (plural subject complements)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "related": [
    {
      "word": "object complement"
    },
    {
      "word": "clausal complement"
    },
    {
      "word": "predicative"
    }
  ],
  "senses": [
    {
      "categories": [
        "English compound terms",
        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "Entries with translation boxes",
        "Pages with 1 entry",
        "Pages with entries",
        "Terms with Danish translations",
        "Terms with Japanese translations",
        "en:Grammar"
      ],
      "examples": [
        {
          "text": "In the sentence \"That is a flying car!\", 'that' is the subject and 'flying car' is the subject complement."
        },
        {
          "text": "In the sentence \"That house seems haunted!\", 'that house' is the subject and 'haunted' is the subject complement (in this case an adjective)."
        }
      ],
      "glosses": [
        "A complement which is coupled to a subject."
      ],
      "links": [
        [
          "grammar",
          "grammar"
        ],
        [
          "complement",
          "complement"
        ],
        [
          "subject",
          "subject"
        ]
      ],
      "raw_glosses": [
        "(grammar) A complement which is coupled to a subject."
      ],
      "topics": [
        "grammar",
        "human-sciences",
        "linguistics",
        "sciences"
      ]
    }
  ],
  "translations": [
    {
      "code": "da",
      "lang": "Danish",
      "lang_code": "da",
      "sense": "subject complement",
      "tags": [
        "neuter"
      ],
      "word": "subjektsprædikat"
    },
    {
      "code": "da",
      "lang": "Danish",
      "lang_code": "da",
      "sense": "subject complement",
      "word": "omsagnsled til grundled"
    },
    {
      "alt": "しゅかくほご",
      "code": "ja",
      "lang": "Japanese",
      "lang_code": "ja",
      "roman": "shukaku-hogo",
      "sense": "subject complement",
      "word": "主格保護"
    }
  ],
  "word": "subject complement"
}