"take aback" meaning in English

{
  "etymology_text": "take aback < → δείτε τις λέξεις take και aback",
  "forms": [
    {
      "form": "take aback",
      "source": "header"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "verb",
  "senses": [
    {
      "examples": [
        {
          "text": "I was taken aback when I saw him there.",
          "translation": "Έπεσα από τα σύννεφα όταν τον είδα εκεί."
        }
      ],
      "glosses": [
        "αποσβολώνω, πέφτω από τα σύννεφα, εκπλήσσω"
      ],
      "id": "el-take_aback-en-verb-H8ZENCms",
      "tags": [
        "error-lua-exec"
      ]
    }
  ],
  "word": "take aback"
}

{
  "etymology_text": "take aback < → δείτε τις λέξεις take και aback",
  "forms": [
    {
      "form": "take aback",
      "source": "header"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "verb",
  "senses": [
    {
      "examples": [
        {
          "text": "I was taken aback when I saw him there.",
          "translation": "Έπεσα από τα σύννεφα όταν τον είδα εκεί."
        }
      ],
      "glosses": [
        "αποσβολώνω, πέφτω από τα σύννεφα, εκπλήσσω"
      ],
      "tags": [
        "error-lua-exec"
      ]
    }
  ],
  "word": "take aback"
}

{
  "called_from": "luaexec/683",
  "msg": "LUA error in #invoke('labels', 'main', '', '', 'label=ιδιωματισμός \\U001020d9 \\U001020d9 \\U001020d9 ', 'όρος= \\U001020d9 ', 'εμφ= \\U001020d9 ', 'σελ= \\U001020d9  ', '0= ', '00= \\U001020d9', '000= \\U001020d9', 'γλ=en \\U001020d9 \\U001020d9', 'ascii= \\U001020d9 \\U001020d9') parent ('Πρότυπο:ετ', {1: 'ιδιωματισμός', 2: 'en'})",
  "path": [
    "take aback",
    "Template:ετ",
    "#invoke",
    "#invoke"
  ],
  "section": "English",
  "subsection": "ρήμα",
  "title": "take aback",
  "trace": "[string \"Module:labels\"]:98: attempt to index field '?' (a nil value)"
}