"cosse" meaning in Old Irish

{
  "etymology_templates": [
    {
      "args": {
        "1": "sga",
        "2": "co",
        "3": "se",
        "t1": "up to, until",
        "t2": "this"
      },
      "expansion": "Univerbation of co (“up to, until”) + se (“this”)",
      "name": "univ"
    }
  ],
  "etymology_text": "Univerbation of co (“up to, until”) + se (“this”)",
  "head_templates": [
    {
      "args": {
        "1": "sga",
        "2": "adverb"
      },
      "expansion": "cosse",
      "name": "head"
    }
  ],
  "lang": "Old Irish",
  "lang_code": "sga",
  "pos": "adv",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Old Irish entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Old Irish univerbations",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 6 entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        }
      ],
      "glosses": [
        "hitherto, up to now"
      ],
      "id": "en-cosse-sga-adv-k9fCHRqY",
      "links": [
        [
          "hitherto",
          "hitherto"
        ],
        [
          "up to",
          "up to"
        ],
        [
          "now",
          "now"
        ]
      ],
      "synonyms": [
        {
          "word": "cose"
        }
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "[ˈkosʲe]"
    }
  ],
  "word": "cosse"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "sga",
        "2": "co",
        "3": "se",
        "t1": "up to, until",
        "t2": "this"
      },
      "expansion": "Univerbation of co (“up to, until”) + se (“this”)",
      "name": "univ"
    }
  ],
  "etymology_text": "Univerbation of co (“up to, until”) + se (“this”)",
  "head_templates": [
    {
      "args": {
        "1": "sga",
        "2": "adverb"
      },
      "expansion": "cosse",
      "name": "head"
    }
  ],
  "lang": "Old Irish",
  "lang_code": "sga",
  "pos": "adv",
  "senses": [
    {
      "categories": [
        "Old Irish adverbs",
        "Old Irish entries with incorrect language header",
        "Old Irish lemmas",
        "Old Irish univerbations",
        "Pages with 6 entries",
        "Pages with entries"
      ],
      "glosses": [
        "hitherto, up to now"
      ],
      "links": [
        [
          "hitherto",
          "hitherto"
        ],
        [
          "up to",
          "up to"
        ],
        [
          "now",
          "now"
        ]
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "[ˈkosʲe]"
    }
  ],
  "synonyms": [
    {
      "word": "cose"
    }
  ],
  "word": "cosse"
}