"maintain" meaning in English

{
  "forms": [
    {
      "form": "maintain"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "verb",
  "senses": [
    {
      "examples": [
        {
          "text": "They are maintaining public order.",
          "translation": "Διατηρούν τη δημόσια τάξη."
        },
        {
          "text": "Buildings, when they are not maintained, they quickly fall into disrepair.",
          "translation": "Τα κτίρια, όταν δε συντηρούνται, καταστρέφονται γρήγορα."
        },
        {
          "text": "a poorly-maintained/well-maintained house - σπίτι κακοσυντηρημένο/καλοσυντηρημένο"
        }
      ],
      "glosses": [
        "διατηρώ, συντηρώ"
      ],
      "id": "el-maintain-en-verb-y5bfG7IE"
    },
    {
      "examples": [
        {
          "text": "He maintained he was innocent.",
          "translation": "Ισχυριζόταν ότι ήταν αθώος."
        },
        {
          "text": "≈ συνώνυμα: → δείτε τη λέξη contend"
        }
      ],
      "glosses": [
        "ισχυρίζομαι, δηλώνω ότι κάτι είναι αληθές"
      ],
      "id": "el-maintain-en-verb-qp6fkHzC"
    }
  ],
  "word": "maintain"
}

{
  "forms": [
    {
      "form": "maintain"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "verb",
  "senses": [
    {
      "examples": [
        {
          "text": "They are maintaining public order.",
          "translation": "Διατηρούν τη δημόσια τάξη."
        },
        {
          "text": "Buildings, when they are not maintained, they quickly fall into disrepair.",
          "translation": "Τα κτίρια, όταν δε συντηρούνται, καταστρέφονται γρήγορα."
        },
        {
          "text": "a poorly-maintained/well-maintained house - σπίτι κακοσυντηρημένο/καλοσυντηρημένο"
        }
      ],
      "glosses": [
        "διατηρώ, συντηρώ"
      ]
    },
    {
      "examples": [
        {
          "text": "He maintained he was innocent.",
          "translation": "Ισχυριζόταν ότι ήταν αθώος."
        },
        {
          "text": "≈ συνώνυμα: → δείτε τη λέξη contend"
        }
      ],
      "glosses": [
        "ισχυρίζομαι, δηλώνω ότι κάτι είναι αληθές"
      ]
    }
  ],
  "word": "maintain"
}