"four-cycle" meaning in English

{
  "forms": [
    {
      "form": "four-cycles",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "four-cycle (plural four-cycles)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Four",
          "orig": "en:Four",
          "parents": [
            "Numbers",
            "All topics",
            "Terms by semantic function",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "examples": [
        {
          "ref": "1862, Gas Engine, volume 6, page 362",
          "text": "[…] well-known automobiles will be fitted with two-cycle engines, whereas they are now equipped with four-cycles.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "Any four-stroke cycle, such as the Otto cycle, for an internal combustion engine."
      ],
      "id": "en-four-cycle-en-noun-NXq1K8Xv",
      "links": [
        [
          "four",
          "four"
        ],
        [
          "stroke",
          "stroke"
        ],
        [
          "Otto cycle",
          "Otto cycle"
        ],
        [
          "internal combustion engine",
          "internal combustion engine"
        ]
      ]
    }
  ],
  "word": "four-cycle"
}

{
  "forms": [
    {
      "form": "four-cycles",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "four-cycle (plural four-cycles)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "English terms with quotations",
        "Quotation templates to be cleaned",
        "en:Four"
      ],
      "examples": [
        {
          "ref": "1862, Gas Engine, volume 6, page 362",
          "text": "[…] well-known automobiles will be fitted with two-cycle engines, whereas they are now equipped with four-cycles.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "Any four-stroke cycle, such as the Otto cycle, for an internal combustion engine."
      ],
      "links": [
        [
          "four",
          "four"
        ],
        [
          "stroke",
          "stroke"
        ],
        [
          "Otto cycle",
          "Otto cycle"
        ],
        [
          "internal combustion engine",
          "internal combustion engine"
        ]
      ]
    }
  ],
  "word": "four-cycle"
}