"proof marks" meaning in All languages combined

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  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
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          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
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          "source": "w"
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          "name": "Pages with entries",
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      "form_of": [
        {
          "word": "proof mark"
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        "plural of proof mark"
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      "id": "en-proof_marks-en-noun-qoDbYVvx",
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        [
          "proof mark",
          "proof mark#English"
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      ],
      "tags": [
        "form-of",
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  "word": "proof marks"
}

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  "lang_code": "en",
  "pos": "noun",
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  "word": "proof marks"
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