"seventy-threes" meaning in English

{
  "head_templates": [
    {
      "args": {
        "1": "en",
        "2": "phrase"
      },
      "expansion": "seventy-threes",
      "name": "head"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "phrase",
  "senses": [
    {
      "categories": [
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Amateur radio",
          "orig": "en:Amateur radio",
          "parents": [
            "Hobbies",
            "Radio",
            "Recreation",
            "Telecommunications",
            "Human activity",
            "Communication",
            "Technology",
            "Human behaviour",
            "All topics",
            "Human",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "examples": [
        {
          "ref": "1963, James Dugan, American Viking",
          "text": "Carlsen concluded the domestic parley with the ham sign-off, \"Seventy-threes,\" and went to the bridge to look at the ocean.",
          "type": "quotation"
        },
        {
          "ref": "1976, Popular Electronics - Volume 9, page 92",
          "text": "Seventy-threes and hope to catch you later.",
          "type": "quotation"
        },
        {
          "ref": "1977, Bob Cunningham, Rod Furan, Barbara Howell Furan, 10-33 emergency, page 8",
          "text": "Seventy-Threes to you, Neil. Look for you later on the flip.",
          "type": "quotation"
        },
        {
          "ref": "1978, U.S. Army Recruiting and Career Counseling Journal",
          "text": "Seventy-threes (regards) to the Cycle Man and spread 'em around (pass the word) on that Super Slab (Interstate).",
          "type": "quotation"
        },
        {
          "ref": "2003, Jerry B. Jenkins, Tim LaHaye, Pursued, page 7",
          "text": "Seventy-threes to you, Deke. Still totin' the Lord?”",
          "type": "quotation"
        }
      ],
      "glosses": [
        "Best wishes; regards."
      ],
      "id": "en-seventy-threes-en-phrase-nj1Cffkm",
      "links": [
        [
          "amateur radio",
          "amateur radio"
        ]
      ],
      "qualifier": "amateur radio; CB; amateur radio; CB",
      "raw_glosses": [
        "(amateur radio, CB) Best wishes; regards."
      ]
    }
  ],
  "word": "seventy-threes"
}

{
  "head_templates": [
    {
      "args": {
        "1": "en",
        "2": "phrase"
      },
      "expansion": "seventy-threes",
      "name": "head"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "phrase",
  "senses": [
    {
      "categories": [
        "English lemmas",
        "English multiword terms",
        "English phrases",
        "English terms with quotations",
        "en:Amateur radio"
      ],
      "examples": [
        {
          "ref": "1963, James Dugan, American Viking",
          "text": "Carlsen concluded the domestic parley with the ham sign-off, \"Seventy-threes,\" and went to the bridge to look at the ocean.",
          "type": "quotation"
        },
        {
          "ref": "1976, Popular Electronics - Volume 9, page 92",
          "text": "Seventy-threes and hope to catch you later.",
          "type": "quotation"
        },
        {
          "ref": "1977, Bob Cunningham, Rod Furan, Barbara Howell Furan, 10-33 emergency, page 8",
          "text": "Seventy-Threes to you, Neil. Look for you later on the flip.",
          "type": "quotation"
        },
        {
          "ref": "1978, U.S. Army Recruiting and Career Counseling Journal",
          "text": "Seventy-threes (regards) to the Cycle Man and spread 'em around (pass the word) on that Super Slab (Interstate).",
          "type": "quotation"
        },
        {
          "ref": "2003, Jerry B. Jenkins, Tim LaHaye, Pursued, page 7",
          "text": "Seventy-threes to you, Deke. Still totin' the Lord?”",
          "type": "quotation"
        }
      ],
      "glosses": [
        "Best wishes; regards."
      ],
      "links": [
        [
          "amateur radio",
          "amateur radio"
        ]
      ],
      "qualifier": "amateur radio; CB; amateur radio; CB",
      "raw_glosses": [
        "(amateur radio, CB) Best wishes; regards."
      ]
    }
  ],
  "word": "seventy-threes"
}