"massless" meaning in English

{
  "antonyms": [
    {
      "word": "massive"
    }
  ],
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "mass",
        "3": "-less"
      },
      "expansion": "mass + -less",
      "name": "af"
    }
  ],
  "etymology_text": "From mass + -less.",
  "head_templates": [
    {
      "args": {
        "1": "-"
      },
      "expansion": "massless (not comparable)",
      "name": "en-adj"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "adj",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "English terms suffixed with -less",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Entries with translation boxes",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Terms with Finnish translations",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Terms with German translations",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Terms with Mandarin translations",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Terms with Russian translations",
          "parents": [],
          "source": "w"
        }
      ],
      "derived": [
        {
          "word": "masslessness"
        }
      ],
      "examples": [
        {
          "text": "The photon is a massless particle.",
          "type": "example"
        },
        {
          "ref": "2014, Mark A. Cunningham, Neoclassical Physics, page 241:",
          "text": "On the other hand, Pauli had just proposed a massless, chargeless, colorless, flavorless particle whose sole reason for existence was to preserve the principle of momentum conservation.",
          "type": "quote"
        }
      ],
      "glosses": [
        "Having no mass."
      ],
      "id": "en-massless-en-adj-uiRFxl68",
      "links": [
        [
          "mass",
          "mass"
        ]
      ],
      "tags": [
        "not-comparable"
      ],
      "translations": [
        {
          "code": "cmn",
          "lang": "Chinese Mandarin",
          "sense": "having no mass",
          "word": "無質量"
        },
        {
          "code": "cmn",
          "lang": "Chinese Mandarin",
          "roman": "wúzhìliàng, wúzhíliàng, wúzhǐliàng",
          "sense": "having no mass",
          "word": "无质量"
        },
        {
          "code": "fi",
          "lang": "Finnish",
          "sense": "having no mass",
          "word": "massaton"
        },
        {
          "code": "de",
          "lang": "German",
          "sense": "having no mass",
          "word": "masselos"
        },
        {
          "code": "ru",
          "lang": "Russian",
          "roman": "bezmássovyj",
          "sense": "having no mass",
          "word": "безма́ссовый"
        }
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/ˈmæs.ləs/",
      "tags": [
        "US"
      ]
    },
    {
      "ipa": "/ˈmæs.lɪs/",
      "tags": [
        "US"
      ]
    },
    {
      "rhymes": "-æsləs"
    }
  ],
  "word": "massless"
}

{
  "antonyms": [
    {
      "word": "massive"
    }
  ],
  "derived": [
    {
      "word": "masslessness"
    }
  ],
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "mass",
        "3": "-less"
      },
      "expansion": "mass + -less",
      "name": "af"
    }
  ],
  "etymology_text": "From mass + -less.",
  "head_templates": [
    {
      "args": {
        "1": "-"
      },
      "expansion": "massless (not comparable)",
      "name": "en-adj"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "adj",
  "senses": [
    {
      "categories": [
        "English adjectives",
        "English entries with incorrect language header",
        "English lemmas",
        "English terms suffixed with -less",
        "English terms with quotations",
        "English terms with usage examples",
        "English uncomparable adjectives",
        "Entries with translation boxes",
        "Pages with 1 entry",
        "Pages with entries",
        "Quotation templates to be cleaned",
        "Rhymes:English/æsləs",
        "Rhymes:English/æsləs/2 syllables",
        "Terms with Finnish translations",
        "Terms with German translations",
        "Terms with Mandarin translations",
        "Terms with Russian translations"
      ],
      "examples": [
        {
          "text": "The photon is a massless particle.",
          "type": "example"
        },
        {
          "ref": "2014, Mark A. Cunningham, Neoclassical Physics, page 241:",
          "text": "On the other hand, Pauli had just proposed a massless, chargeless, colorless, flavorless particle whose sole reason for existence was to preserve the principle of momentum conservation.",
          "type": "quote"
        }
      ],
      "glosses": [
        "Having no mass."
      ],
      "links": [
        [
          "mass",
          "mass"
        ]
      ],
      "tags": [
        "not-comparable"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/ˈmæs.ləs/",
      "tags": [
        "US"
      ]
    },
    {
      "ipa": "/ˈmæs.lɪs/",
      "tags": [
        "US"
      ]
    },
    {
      "rhymes": "-æsləs"
    }
  ],
  "translations": [
    {
      "code": "cmn",
      "lang": "Chinese Mandarin",
      "sense": "having no mass",
      "word": "無質量"
    },
    {
      "code": "cmn",
      "lang": "Chinese Mandarin",
      "roman": "wúzhìliàng, wúzhíliàng, wúzhǐliàng",
      "sense": "having no mass",
      "word": "无质量"
    },
    {
      "code": "fi",
      "lang": "Finnish",
      "sense": "having no mass",
      "word": "massaton"
    },
    {
      "code": "de",
      "lang": "German",
      "sense": "having no mass",
      "word": "masselos"
    },
    {
      "code": "ru",
      "lang": "Russian",
      "roman": "bezmássovyj",
      "sense": "having no mass",
      "word": "безма́ссовый"
    }
  ],
  "word": "massless"
}