"clock paradox" meaning in English

{
  "forms": [
    {
      "form": "clock paradoxes",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "clock paradox (plural clock paradoxes)",
      "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": "other",
          "langcode": "en",
          "name": "Interstellar travel",
          "orig": "en:Interstellar travel",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "langcode": "en",
          "name": "Paradoxes",
          "orig": "en:Paradoxes",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Relativity",
          "orig": "en:Relativity",
          "parents": [
            "Physics",
            "Sciences",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Time",
          "orig": "en:Time",
          "parents": [
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "The phenomenon in which two observers who start together with identical clocks, follow different timelines, and then rejoin can have different elapsed times on their clocks, especially if one travels at a relativistic speed."
      ],
      "id": "en-clock_paradox-en-noun-LPcoBzZO",
      "links": [
        [
          "relativity",
          "relativity"
        ],
        [
          "observer",
          "observer"
        ],
        [
          "timeline",
          "timeline"
        ],
        [
          "rejoin",
          "rejoin"
        ],
        [
          "elapse",
          "elapse"
        ],
        [
          "relativistic",
          "relativistic"
        ]
      ],
      "qualifier": "relativity",
      "raw_glosses": [
        "(relativity) The phenomenon in which two observers who start together with identical clocks, follow different timelines, and then rejoin can have different elapsed times on their clocks, especially if one travels at a relativistic speed."
      ],
      "synonyms": [
        {
          "word": "twin paradox"
        }
      ],
      "translations": [
        {
          "code": "fi",
          "lang": "Finnish",
          "sense": "physical phenomenon",
          "word": "kaksosparadoksi"
        },
        {
          "code": "fi",
          "lang": "Finnish",
          "sense": "physical phenomenon",
          "word": "kelloparadoksi"
        },
        {
          "code": "ta",
          "lang": "Tamil",
          "roman": "kaṭikārap putir",
          "sense": "physical phenomenon",
          "word": "கடிகாரப் புதிர்"
        }
      ]
    }
  ],
  "word": "clock paradox"
}

{
  "forms": [
    {
      "form": "clock paradoxes",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "clock paradox (plural clock paradoxes)",
      "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",
        "en:Interstellar travel",
        "en:Paradoxes",
        "en:Relativity",
        "en:Time"
      ],
      "glosses": [
        "The phenomenon in which two observers who start together with identical clocks, follow different timelines, and then rejoin can have different elapsed times on their clocks, especially if one travels at a relativistic speed."
      ],
      "links": [
        [
          "relativity",
          "relativity"
        ],
        [
          "observer",
          "observer"
        ],
        [
          "timeline",
          "timeline"
        ],
        [
          "rejoin",
          "rejoin"
        ],
        [
          "elapse",
          "elapse"
        ],
        [
          "relativistic",
          "relativistic"
        ]
      ],
      "qualifier": "relativity",
      "raw_glosses": [
        "(relativity) The phenomenon in which two observers who start together with identical clocks, follow different timelines, and then rejoin can have different elapsed times on their clocks, especially if one travels at a relativistic speed."
      ]
    }
  ],
  "synonyms": [
    {
      "word": "twin paradox"
    }
  ],
  "translations": [
    {
      "code": "fi",
      "lang": "Finnish",
      "sense": "physical phenomenon",
      "word": "kaksosparadoksi"
    },
    {
      "code": "fi",
      "lang": "Finnish",
      "sense": "physical phenomenon",
      "word": "kelloparadoksi"
    },
    {
      "code": "ta",
      "lang": "Tamil",
      "roman": "kaṭikārap putir",
      "sense": "physical phenomenon",
      "word": "கடிகாரப் புதிர்"
    }
  ],
  "word": "clock paradox"
}