"contester" meaning in Latin

{
  "head_templates": [
    {
      "args": {
        "1": "la",
        "2": "verb form"
      },
      "expansion": "contester",
      "name": "head"
    }
  ],
  "lang": "Latin",
  "lang_code": "la",
  "pos": "verb",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Latin entries with incorrect language header",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 5 entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "_dis": "26 13 29 15 8 7",
          "kind": "other",
          "name": "Old French entries with incorrect language header",
          "parents": [],
          "source": "w+disamb"
        },
        {
          "_dis": "22 16 28 19 7 7",
          "kind": "other",
          "name": "Old French verbs ending in -er",
          "parents": [],
          "source": "w+disamb"
        },
        {
          "_dis": "9 14 36 15 14 13",
          "kind": "other",
          "name": "Old French verbs with weak-a preterite",
          "parents": [],
          "source": "w+disamb"
        }
      ],
      "form_of": [
        {
          "word": "contestor"
        }
      ],
      "glosses": [
        "first-person singular present active subjunctive of contestor"
      ],
      "id": "en-contester-la-verb-NYl5i0mm",
      "links": [
        [
          "contestor",
          "contestor#Latin"
        ]
      ],
      "tags": [
        "active",
        "first-person",
        "form-of",
        "present",
        "singular",
        "subjunctive"
      ]
    }
  ],
  "word": "contester"
}

{
  "categories": [
    "Old French entries with incorrect language header",
    "Old French first group verbs",
    "Old French lemmas",
    "Old French terms borrowed from Latin",
    "Old French terms derived from Latin",
    "Old French verbs",
    "Old French verbs ending in -er",
    "Old French verbs with weak-a preterite",
    "Pages with 5 entries",
    "Pages with entries"
  ],
  "head_templates": [
    {
      "args": {
        "1": "la",
        "2": "verb form"
      },
      "expansion": "contester",
      "name": "head"
    }
  ],
  "lang": "Latin",
  "lang_code": "la",
  "pos": "verb",
  "senses": [
    {
      "categories": [
        "Latin entries with incorrect language header",
        "Latin non-lemma forms",
        "Latin verb forms",
        "Pages with 5 entries",
        "Pages with entries"
      ],
      "form_of": [
        {
          "word": "contestor"
        }
      ],
      "glosses": [
        "first-person singular present active subjunctive of contestor"
      ],
      "links": [
        [
          "contestor",
          "contestor#Latin"
        ]
      ],
      "tags": [
        "active",
        "first-person",
        "form-of",
        "present",
        "singular",
        "subjunctive"
      ]
    }
  ],
  "word": "contester"
}