"up against" meaning in English

{
  "derived": [
    {
      "_dis1": "0 0",
      "word": "be up against"
    },
    {
      "_dis1": "0 0",
      "word": "go up against"
    },
    {
      "_dis1": "0 0",
      "word": "hit up against"
    },
    {
      "_dis1": "0 0",
      "word": "rub up against"
    },
    {
      "_dis1": "0 0",
      "word": "run up against"
    },
    {
      "_dis1": "0 0",
      "word": "stand up against"
    },
    {
      "_dis1": "0 0",
      "word": "up against it"
    },
    {
      "_dis1": "0 0",
      "word": "up against the wall"
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "en",
        "2": "prepositions",
        "head": ""
      },
      "expansion": "up against",
      "name": "head"
    },
    {
      "args": {},
      "expansion": "up against",
      "name": "en-prep"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "prep",
  "senses": [
    {
      "categories": [
        {
          "_dis": "85 15",
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w+disamb"
        },
        {
          "_dis": "59 41",
          "kind": "other",
          "name": "English prepositions",
          "parents": [],
          "source": "w+disamb"
        }
      ],
      "examples": [
        {
          "text": "If you try to change the school schedule like that, you'll be up against legions of angry parents.",
          "type": "example"
        }
      ],
      "glosses": [
        "Facing; challenging, or opposing."
      ],
      "id": "en-up_against-en-prep-M56kCJCG",
      "links": [
        [
          "challenging",
          "challenging"
        ],
        [
          "opposing",
          "opposing"
        ]
      ],
      "raw_glosses": [
        "(idiomatic) Facing; challenging, or opposing."
      ],
      "tags": [
        "idiomatic"
      ]
    },
    {
      "categories": [],
      "examples": [
        {
          "text": "If the tree grows up against the garden wall then either the tree will be crowded and stunted or the wall will be pushed out.",
          "type": "example"
        }
      ],
      "glosses": [
        "In contact with, abutting."
      ],
      "id": "en-up_against-en-prep-9Ptz5HkO",
      "links": [
        [
          "contact",
          "contact"
        ],
        [
          "abutting",
          "abut"
        ]
      ]
    }
  ],
  "sounds": [
    {
      "audio": "En-au-up against.ogg",
      "mp3_url": "https://upload.wikimedia.org/wikipedia/commons/transcoded/f/f5/En-au-up_against.ogg/En-au-up_against.ogg.mp3",
      "ogg_url": "https://upload.wikimedia.org/wikipedia/commons/f/f5/En-au-up_against.ogg",
      "tags": [
        "Australia"
      ],
      "text": "Audio (AU)"
    }
  ],
  "word": "up against"
}

{
  "categories": [
    "English entries with incorrect language header",
    "English lemmas",
    "English multiword terms",
    "English prepositions",
    "English terms with audio links"
  ],
  "derived": [
    {
      "word": "be up against"
    },
    {
      "word": "go up against"
    },
    {
      "word": "hit up against"
    },
    {
      "word": "rub up against"
    },
    {
      "word": "run up against"
    },
    {
      "word": "stand up against"
    },
    {
      "word": "up against it"
    },
    {
      "word": "up against the wall"
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "en",
        "2": "prepositions",
        "head": ""
      },
      "expansion": "up against",
      "name": "head"
    },
    {
      "args": {},
      "expansion": "up against",
      "name": "en-prep"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "prep",
  "senses": [
    {
      "categories": [
        "English idioms",
        "English terms with usage examples"
      ],
      "examples": [
        {
          "text": "If you try to change the school schedule like that, you'll be up against legions of angry parents.",
          "type": "example"
        }
      ],
      "glosses": [
        "Facing; challenging, or opposing."
      ],
      "links": [
        [
          "challenging",
          "challenging"
        ],
        [
          "opposing",
          "opposing"
        ]
      ],
      "raw_glosses": [
        "(idiomatic) Facing; challenging, or opposing."
      ],
      "tags": [
        "idiomatic"
      ]
    },
    {
      "categories": [
        "English terms with usage examples"
      ],
      "examples": [
        {
          "text": "If the tree grows up against the garden wall then either the tree will be crowded and stunted or the wall will be pushed out.",
          "type": "example"
        }
      ],
      "glosses": [
        "In contact with, abutting."
      ],
      "links": [
        [
          "contact",
          "contact"
        ],
        [
          "abutting",
          "abut"
        ]
      ]
    }
  ],
  "sounds": [
    {
      "audio": "En-au-up against.ogg",
      "mp3_url": "https://upload.wikimedia.org/wikipedia/commons/transcoded/f/f5/En-au-up_against.ogg/En-au-up_against.ogg.mp3",
      "ogg_url": "https://upload.wikimedia.org/wikipedia/commons/f/f5/En-au-up_against.ogg",
      "tags": [
        "Australia"
      ],
      "text": "Audio (AU)"
    }
  ],
  "word": "up against"
}