"keep one's guard up" meaning in English

{
  "forms": [
    {
      "form": "keeps one's guard up",
      "tags": [
        "present",
        "singular",
        "third-person"
      ]
    },
    {
      "form": "keeping one's guard up",
      "tags": [
        "participle",
        "present"
      ]
    },
    {
      "form": "kept one's guard up",
      "tags": [
        "participle",
        "past"
      ]
    },
    {
      "form": "kept one's guard up",
      "tags": [
        "past"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "keep<,,kept> one's guard up"
      },
      "expansion": "keep one's guard up (third-person singular simple present keeps one's guard up, present participle keeping one's guard up, simple past and past participle kept one's guard up)",
      "name": "en-verb"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "verb",
  "senses": [
    {
      "antonyms": [
        {
          "word": "lower one's guard"
        },
        {
          "word": "let one's guard down"
        }
      ],
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Entries with translation boxes",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Terms with Finnish translations",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Terms with French translations",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Terms with Polish translations",
          "parents": [],
          "source": "w"
        }
      ],
      "glosses": [
        "To be careful and alert to the possibility of danger."
      ],
      "id": "en-keep_one's_guard_up-en-verb-Eo5tnu19",
      "links": [
        [
          "careful",
          "careful"
        ],
        [
          "alert",
          "alert"
        ],
        [
          "danger",
          "danger"
        ]
      ],
      "synonyms": [
        {
          "word": "have one's guard up"
        },
        {
          "word": "be on one's guard"
        }
      ],
      "translations": [
        {
          "code": "fi",
          "lang": "Finnish",
          "sense": "Translations",
          "word": "pysyä valppaana"
        },
        {
          "code": "fi",
          "lang": "Finnish",
          "sense": "Translations",
          "word": "pitää varansa"
        },
        {
          "code": "fr",
          "lang": "French",
          "sense": "Translations",
          "word": "rester sur ses gardes"
        },
        {
          "code": "pl",
          "lang": "Polish",
          "sense": "Translations",
          "tags": [
            "imperfective"
          ],
          "word": "trzymać gardę"
        }
      ]
    }
  ],
  "word": "keep one's guard up"
}

{
  "forms": [
    {
      "form": "keeps one's guard up",
      "tags": [
        "present",
        "singular",
        "third-person"
      ]
    },
    {
      "form": "keeping one's guard up",
      "tags": [
        "participle",
        "present"
      ]
    },
    {
      "form": "kept one's guard up",
      "tags": [
        "participle",
        "past"
      ]
    },
    {
      "form": "kept one's guard up",
      "tags": [
        "past"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "keep<,,kept> one's guard up"
      },
      "expansion": "keep one's guard up (third-person singular simple present keeps one's guard up, present participle keeping one's guard up, simple past and past participle kept one's guard up)",
      "name": "en-verb"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "verb",
  "senses": [
    {
      "antonyms": [
        {
          "word": "lower one's guard"
        },
        {
          "word": "let one's guard down"
        }
      ],
      "categories": [
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English verbs",
        "Entries with translation boxes",
        "Pages with 1 entry",
        "Pages with entries",
        "Terms with Finnish translations",
        "Terms with French translations",
        "Terms with Polish translations",
        "Translation table header lacks gloss"
      ],
      "glosses": [
        "To be careful and alert to the possibility of danger."
      ],
      "links": [
        [
          "careful",
          "careful"
        ],
        [
          "alert",
          "alert"
        ],
        [
          "danger",
          "danger"
        ]
      ],
      "synonyms": [
        {
          "word": "have one's guard up"
        },
        {
          "word": "be on one's guard"
        }
      ]
    }
  ],
  "translations": [
    {
      "code": "fi",
      "lang": "Finnish",
      "sense": "Translations",
      "word": "pysyä valppaana"
    },
    {
      "code": "fi",
      "lang": "Finnish",
      "sense": "Translations",
      "word": "pitää varansa"
    },
    {
      "code": "fr",
      "lang": "French",
      "sense": "Translations",
      "word": "rester sur ses gardes"
    },
    {
      "code": "pl",
      "lang": "Polish",
      "sense": "Translations",
      "tags": [
        "imperfective"
      ],
      "word": "trzymać gardę"
    }
  ],
  "word": "keep one's guard up"
}