"at once" meaning in English

{
  "etymology_text": ": at once < → δείτε τις λέξεις at και once",
  "forms": [
    {
      "form": "at once"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "phrase",
  "senses": [
    {
      "examples": [
        {
          "text": "Come here at once!",
          "translation": "Έλα εδώ αμέσως!"
        },
        {
          "text": "≈ συνώνυμα: → δείτε τη λέξη immediately"
        }
      ],
      "glosses": [
        "αμέσως"
      ],
      "id": "el-at_once-en-phrase-myNPPBKM"
    },
    {
      "examples": [
        {
          "text": "He was laughing and crying at once.",
          "translation": "Γελούσε κι έκλαιγε ταυτοχρόνως."
        },
        {
          "text": "≈ συνώνυμα: all at once → και δείτε τη λέξη simultaneously"
        }
      ],
      "glosses": [
        "ταυτόχρονα"
      ],
      "id": "el-at_once-en-phrase-zZushDsh"
    }
  ],
  "word": "at once"
}

{
  "etymology_text": ": at once < → δείτε τις λέξεις at και once",
  "forms": [
    {
      "form": "at once"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "phrase",
  "senses": [
    {
      "examples": [
        {
          "text": "Come here at once!",
          "translation": "Έλα εδώ αμέσως!"
        },
        {
          "text": "≈ συνώνυμα: → δείτε τη λέξη immediately"
        }
      ],
      "glosses": [
        "αμέσως"
      ]
    },
    {
      "examples": [
        {
          "text": "He was laughing and crying at once.",
          "translation": "Γελούσε κι έκλαιγε ταυτοχρόνως."
        },
        {
          "text": "≈ συνώνυμα: all at once → και δείτε τη λέξη simultaneously"
        }
      ],
      "glosses": [
        "ταυτόχρονα"
      ]
    }
  ],
  "word": "at once"
}