"-atum" meaning in Latin

{
  "categories": [
    {
      "kind": "other",
      "name": "Suffixes en latin",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "Latin",
      "orig": "latin",
      "parents": [],
      "source": "w"
    }
  ],
  "etymology_texts": [
    "→ voir -atus."
  ],
  "lang": "Latin",
  "lang_code": "la",
  "pos": "suffix",
  "pos_title": "Suffixe",
  "related": [
    {
      "sense": "-ire",
      "word": "-itum"
    }
  ],
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Wiktionnaire:Exemples manquants en latin",
          "parents": [],
          "source": "w"
        }
      ],
      "glosses": [
        "Suffixe le supin des verbes du premier groupe."
      ],
      "id": "fr--atum-la-suffix-TyBz2jmG"
    }
  ],
  "tags": [
    "morpheme"
  ],
  "word": "-atum"
}

{
  "categories": [
    "Suffixes en latin",
    "latin"
  ],
  "etymology_texts": [
    "→ voir -atus."
  ],
  "lang": "Latin",
  "lang_code": "la",
  "pos": "suffix",
  "pos_title": "Suffixe",
  "related": [
    {
      "sense": "-ire",
      "word": "-itum"
    }
  ],
  "senses": [
    {
      "categories": [
        "Wiktionnaire:Exemples manquants en latin"
      ],
      "glosses": [
        "Suffixe le supin des verbes du premier groupe."
      ]
    }
  ],
  "tags": [
    "morpheme"
  ],
  "word": "-atum"
}