"costless" meaning in English

{
  "antonyms": [
    {
      "word": "costful"
    },
    {
      "word": "costly"
    }
  ],
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "cost",
        "3": "less"
      },
      "expansion": "cost + -less",
      "name": "suffix"
    },
    {
      "args": {
        "1": "nl",
        "2": "kosteloos",
        "3": "",
        "4": "costless, free"
      },
      "expansion": "Dutch kosteloos (“costless, free”)",
      "name": "cog"
    }
  ],
  "etymology_text": "From cost + -less. Compare Dutch kosteloos (“costless, free”).",
  "head_templates": [
    {
      "args": {
        "1": "-"
      },
      "expansion": "costless (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"
        }
      ],
      "derived": [
        {
          "word": "costlessly"
        }
      ],
      "glosses": [
        "having no cost"
      ],
      "id": "en-costless-en-adj-~5tUcLft",
      "links": [
        [
          "cost",
          "cost"
        ]
      ],
      "synonyms": [
        {
          "word": "free"
        }
      ],
      "tags": [
        "not-comparable"
      ]
    }
  ],
  "word": "costless"
}

{
  "antonyms": [
    {
      "word": "costful"
    },
    {
      "word": "costly"
    }
  ],
  "derived": [
    {
      "word": "costlessly"
    }
  ],
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "cost",
        "3": "less"
      },
      "expansion": "cost + -less",
      "name": "suffix"
    },
    {
      "args": {
        "1": "nl",
        "2": "kosteloos",
        "3": "",
        "4": "costless, free"
      },
      "expansion": "Dutch kosteloos (“costless, free”)",
      "name": "cog"
    }
  ],
  "etymology_text": "From cost + -less. Compare Dutch kosteloos (“costless, free”).",
  "head_templates": [
    {
      "args": {
        "1": "-"
      },
      "expansion": "costless (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 uncomparable adjectives"
      ],
      "glosses": [
        "having no cost"
      ],
      "links": [
        [
          "cost",
          "cost"
        ]
      ],
      "tags": [
        "not-comparable"
      ]
    }
  ],
  "synonyms": [
    {
      "word": "free"
    }
  ],
  "word": "costless"
}