"on a first-name basis" meaning in English

{
  "head_templates": [
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      "expansion": "on a first-name basis (not comparable)",
      "name": "en-adv"
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  "lang": "English",
  "lang_code": "en",
  "pos": "adv",
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        {
          "kind": "topical",
          "langcode": "en",
          "name": "Onomastics",
          "orig": "en:Onomastics",
          "parents": [
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            "Names",
            "Language",
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            "Proper nouns",
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        }
      ],
      "examples": [
        {
          "text": "We are not yet on a first-name basis.",
          "type": "example"
        }
      ],
      "glosses": [
        "Having enough familiarity with another person to call them by their first name, as opposed to their surname."
      ],
      "id": "en-on_a_first-name_basis-en-adv-5qQi-qt3",
      "links": [
        [
          "familiarity",
          "familiarity"
        ]
      ],
      "raw_glosses": [
        "(idiomatic) Having enough familiarity with another person to call them by their first name, as opposed to their surname."
      ],
      "related": [
        {
          "word": "on first-name terms"
        }
      ],
      "synonyms": [
        {
          "word": "on first-name basis"
        }
      ],
      "tags": [
        "idiomatic",
        "not-comparable"
      ],
      "translations": [
        {
          "code": "cmn",
          "lang": "Chinese Mandarin",
          "roman": "guānxì yǐjīng qīnmì dào zhíhūqímíng le",
          "sense": "having enough familiarity with another person to call them by their first name",
          "word": "關係已經親密到直呼其名了 /关系已经亲密到直呼其名了"
        },
        {
          "code": "fi",
          "english": "to call by first name",
          "lang": "Finnish",
          "sense": "having enough familiarity with another person to call them by their first name",
          "word": "sinutella"
        },
        {
          "code": "de",
          "lang": "German",
          "sense": "having enough familiarity with another person to call them by their first name",
          "word": "per Du"
        },
        {
          "code": "hu",
          "english": "to call someone informally",
          "lang": "Hungarian",
          "sense": "having enough familiarity with another person to call them by their first name",
          "word": "tegez"
        },
        {
          "code": "ru",
          "lang": "Russian",
          "roman": "na \"ty\"",
          "sense": "having enough familiarity with another person to call them by their first name",
          "word": "на \"ты\""
        }
      ]
    }
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  "word": "on a first-name basis"
}

{
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      "expansion": "on a first-name basis (not comparable)",
      "name": "en-adv"
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  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "adv",
  "related": [
    {
      "word": "on first-name terms"
    }
  ],
  "senses": [
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        "en:Onomastics"
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      "examples": [
        {
          "text": "We are not yet on a first-name basis.",
          "type": "example"
        }
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      "glosses": [
        "Having enough familiarity with another person to call them by their first name, as opposed to their surname."
      ],
      "links": [
        [
          "familiarity",
          "familiarity"
        ]
      ],
      "raw_glosses": [
        "(idiomatic) Having enough familiarity with another person to call them by their first name, as opposed to their surname."
      ],
      "synonyms": [
        {
          "word": "on first-name basis"
        }
      ],
      "tags": [
        "idiomatic",
        "not-comparable"
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  "translations": [
    {
      "code": "cmn",
      "lang": "Chinese Mandarin",
      "roman": "guānxì yǐjīng qīnmì dào zhíhūqímíng le",
      "sense": "having enough familiarity with another person to call them by their first name",
      "word": "關係已經親密到直呼其名了 /关系已经亲密到直呼其名了"
    },
    {
      "code": "fi",
      "english": "to call by first name",
      "lang": "Finnish",
      "sense": "having enough familiarity with another person to call them by their first name",
      "word": "sinutella"
    },
    {
      "code": "de",
      "lang": "German",
      "sense": "having enough familiarity with another person to call them by their first name",
      "word": "per Du"
    },
    {
      "code": "hu",
      "english": "to call someone informally",
      "lang": "Hungarian",
      "sense": "having enough familiarity with another person to call them by their first name",
      "word": "tegez"
    },
    {
      "code": "ru",
      "lang": "Russian",
      "roman": "na \"ty\"",
      "sense": "having enough familiarity with another person to call them by their first name",
      "word": "на \"ты\""
    }
  ],
  "word": "on a first-name basis"
}