"trialling" meaning in English

{
  "head_templates": [
    {
      "args": {
        "1": "en",
        "2": "verb form"
      },
      "expansion": "trialling",
      "name": "head"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "verb",
  "senses": [
    {
      "categories": [
        {
          "_dis": "36 12 52",
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w+disamb"
        },
        {
          "_dis": "19 14 68",
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w+disamb"
        },
        {
          "_dis": "14 10 75",
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w+disamb"
        },
        {
          "_dis": "7 24 69",
          "kind": "lifeform",
          "langcode": "en",
          "name": "Horse racing",
          "orig": "en:Horse racing",
          "parents": [
            "Equestrianism",
            "Horses",
            "Animal riding",
            "Sports",
            "Equids",
            "Livestock",
            "Transport",
            "Human activity",
            "Odd-toed ungulates",
            "Agriculture",
            "Animals",
            "All topics",
            "Human behaviour",
            "Mammals",
            "Applied sciences",
            "Lifeforms",
            "Fundamental",
            "Human",
            "Vertebrates",
            "Sciences",
            "Life",
            "Chordates",
            "Nature"
          ],
          "source": "w+disamb"
        }
      ],
      "glosses": [
        "(Canadian spelling, common) present participle and gerund of trial"
      ],
      "id": "en-trialling-en-verb-mX-jNFa9",
      "links": [
        [
          "trial",
          "trial#English"
        ]
      ],
      "raw_glosses": [
        "(British spelling) (Canadian spelling, common) present participle and gerund of trial"
      ],
      "tags": [
        "UK"
      ]
    }
  ],
  "word": "trialling"
}

{
  "forms": [
    {
      "form": "triallings",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "-",
        "2": "s"
      },
      "expansion": "trialling (usually uncountable, plural triallings)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [],
      "examples": [
        {
          "ref": "2020 July 29, David Clough, “AC/DC: the big switch in power supply”, in Rail, page 65:",
          "text": "Barker's proposal to try out new equipment before mass introduction should also have been heeded, because traction components bought without trialling for the Glasgow and Great Eastern schemes gave trouble.",
          "type": "quote"
        }
      ],
      "glosses": [
        "The process of running a trial; an experiment or pilot."
      ],
      "id": "en-trialling-en-noun-N2dBFj2d",
      "links": [
        [
          "experiment",
          "experiment"
        ],
        [
          "pilot",
          "pilot"
        ]
      ],
      "tags": [
        "uncountable",
        "usually"
      ]
    },
    {
      "glosses": [
        "The running of trial races, especially for horses or greyhounds."
      ],
      "id": "en-trialling-en-noun-daDc28p-",
      "links": [
        [
          "race",
          "race"
        ],
        [
          "horse",
          "horse"
        ],
        [
          "greyhound",
          "greyhound"
        ]
      ],
      "tags": [
        "uncountable",
        "usually"
      ]
    }
  ],
  "word": "trialling"
}

{
  "categories": [
    "English countable nouns",
    "English entries with incorrect language header",
    "English lemmas",
    "English non-lemma forms",
    "English nouns",
    "English uncountable nouns",
    "English verb forms",
    "English verbal nouns",
    "Pages with 1 entry",
    "Pages with entries",
    "en:Horse racing"
  ],
  "head_templates": [
    {
      "args": {
        "1": "en",
        "2": "verb form"
      },
      "expansion": "trialling",
      "name": "head"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "verb",
  "senses": [
    {
      "categories": [
        "British English forms",
        "Canadian English forms"
      ],
      "glosses": [
        "(Canadian spelling, common) present participle and gerund of trial"
      ],
      "links": [
        [
          "trial",
          "trial#English"
        ]
      ],
      "raw_glosses": [
        "(British spelling) (Canadian spelling, common) present participle and gerund of trial"
      ],
      "tags": [
        "UK"
      ]
    }
  ],
  "word": "trialling"
}

{
  "categories": [
    "English countable nouns",
    "English entries with incorrect language header",
    "English lemmas",
    "English non-lemma forms",
    "English nouns",
    "English uncountable nouns",
    "English verb forms",
    "English verbal nouns",
    "Pages with 1 entry",
    "Pages with entries",
    "en:Horse racing"
  ],
  "forms": [
    {
      "form": "triallings",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "-",
        "2": "s"
      },
      "expansion": "trialling (usually uncountable, plural triallings)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "English terms with quotations"
      ],
      "examples": [
        {
          "ref": "2020 July 29, David Clough, “AC/DC: the big switch in power supply”, in Rail, page 65:",
          "text": "Barker's proposal to try out new equipment before mass introduction should also have been heeded, because traction components bought without trialling for the Glasgow and Great Eastern schemes gave trouble.",
          "type": "quote"
        }
      ],
      "glosses": [
        "The process of running a trial; an experiment or pilot."
      ],
      "links": [
        [
          "experiment",
          "experiment"
        ],
        [
          "pilot",
          "pilot"
        ]
      ],
      "tags": [
        "uncountable",
        "usually"
      ]
    },
    {
      "glosses": [
        "The running of trial races, especially for horses or greyhounds."
      ],
      "links": [
        [
          "race",
          "race"
        ],
        [
          "horse",
          "horse"
        ],
        [
          "greyhound",
          "greyhound"
        ]
      ],
      "tags": [
        "uncountable",
        "usually"
      ]
    }
  ],
  "word": "trialling"
}