"ahead of" meaning in Anglais

{
  "categories": [
    {
      "kind": "other",
      "name": "Locutions prépositives en anglais",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "Anglais",
      "orig": "anglais",
      "parents": [],
      "source": "w"
    }
  ],
  "lang": "Anglais",
  "lang_code": "en",
  "pos": "prep",
  "pos_title": "Locution prépositive",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Exemples en anglais",
          "parents": [],
          "source": "w"
        }
      ],
      "examples": [
        {
          "bold_text_offsets": [
            [
              21,
              29
            ]
          ],
          "text": "You have a long trip ahead of you.",
          "translation": "Vous avez un long voyage devant vous."
        }
      ],
      "glosses": [
        "Devant."
      ],
      "id": "fr-ahead_of-en-prep-MkQETJYo"
    },
    {
      "categories": [
        {
          "kind": "other",
          "name": "Exemples en anglais",
          "parents": [],
          "source": "w"
        }
      ],
      "examples": [
        {
          "bold_text_offsets": [
            [
              43,
              51
            ]
          ],
          "text": "He’s giving a series of concerts in London ahead of his international tour.",
          "translation": "Il donne une série de concerts à Londres avant sa tournée internationale."
        }
      ],
      "glosses": [
        "Avant."
      ],
      "id": "fr-ahead_of-en-prep-6qzTyNXk"
    }
  ],
  "synonyms": [
    {
      "word": "above"
    },
    {
      "word": "before"
    },
    {
      "word": "in front of"
    },
    {
      "word": "to"
    }
  ],
  "word": "ahead of"
}

{
  "categories": [
    "Locutions prépositives en anglais",
    "anglais"
  ],
  "lang": "Anglais",
  "lang_code": "en",
  "pos": "prep",
  "pos_title": "Locution prépositive",
  "senses": [
    {
      "categories": [
        "Exemples en anglais"
      ],
      "examples": [
        {
          "bold_text_offsets": [
            [
              21,
              29
            ]
          ],
          "text": "You have a long trip ahead of you.",
          "translation": "Vous avez un long voyage devant vous."
        }
      ],
      "glosses": [
        "Devant."
      ]
    },
    {
      "categories": [
        "Exemples en anglais"
      ],
      "examples": [
        {
          "bold_text_offsets": [
            [
              43,
              51
            ]
          ],
          "text": "He’s giving a series of concerts in London ahead of his international tour.",
          "translation": "Il donne une série de concerts à Londres avant sa tournée internationale."
        }
      ],
      "glosses": [
        "Avant."
      ]
    }
  ],
  "synonyms": [
    {
      "word": "above"
    },
    {
      "word": "before"
    },
    {
      "word": "in front of"
    },
    {
      "word": "to"
    }
  ],
  "word": "ahead of"
}