"on the front line" meaning in All languages combined

{
  "categories": [
    {
      "kind": "other",
      "name": "Compositions en anglais",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "Locutions adjectivales en anglais",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "Anglais",
      "orig": "anglais",
      "parents": [],
      "source": "w"
    }
  ],
  "etymology_texts": [
    "Composé de on, front et line."
  ],
  "lang": "Anglais",
  "lang_code": "en",
  "pos": "adj",
  "pos_title": "Locution adjectivale",
  "senses": [
    {
      "glosses": [
        "En première ligne."
      ],
      "id": "fr-on_the_front_line-en-adj-NO~z6kC9"
    }
  ],
  "synonyms": [
    {
      "word": "on the front lines"
    }
  ],
  "word": "on the front line"
}

{
  "categories": [
    "Compositions en anglais",
    "Locutions adjectivales en anglais",
    "anglais"
  ],
  "etymology_texts": [
    "Composé de on, front et line."
  ],
  "lang": "Anglais",
  "lang_code": "en",
  "pos": "adj",
  "pos_title": "Locution adjectivale",
  "senses": [
    {
      "glosses": [
        "En première ligne."
      ]
    }
  ],
  "synonyms": [
    {
      "word": "on the front lines"
    }
  ],
  "word": "on the front line"
}