"кси" meaning in Macedonian

{
  "forms": [
    {
      "form": "ksi",
      "tags": [
        "romanization"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "n"
      },
      "expansion": "кси • (ksi) n",
      "name": "mk-noun"
    }
  ],
  "lang": "Macedonian",
  "lang_code": "mk",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Macedonian entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 2 entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "mk",
          "name": "Greek letter names",
          "orig": "mk:Greek letter names",
          "parents": [
            "Letter names",
            "Letters, symbols, and punctuation",
            "Names",
            "Orthography",
            "All topics",
            "Proper nouns",
            "Terms by semantic function",
            "Writing",
            "Fundamental",
            "Nouns",
            "Human behaviour",
            "Language",
            "Lemmas",
            "Human",
            "Communication"
          ],
          "source": "w"
        },
        {
          "_dis": "74 7 19",
          "kind": "other",
          "name": "Pages with 2 entries",
          "parents": [],
          "source": "w+disamb"
        }
      ],
      "glosses": [
        "xi (Greek letter)"
      ],
      "id": "en-кси-mk-noun-XG6V6cy2",
      "links": [
        [
          "xi",
          "xi"
        ]
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "[ksi]"
    }
  ],
  "word": "кси"
}

{
  "categories": [
    "Pages with 2 entries"
  ],
  "forms": [
    {
      "form": "ksi",
      "tags": [
        "romanization"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "n"
      },
      "expansion": "кси • (ksi) n",
      "name": "mk-noun"
    }
  ],
  "lang": "Macedonian",
  "lang_code": "mk",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "Macedonian 1-syllable words",
        "Macedonian entries with incorrect language header",
        "Macedonian lemmas",
        "Macedonian neuter nouns",
        "Macedonian nouns",
        "Macedonian oxytone terms",
        "Macedonian terms with IPA pronunciation",
        "Pages with 2 entries",
        "mk:Greek letter names"
      ],
      "glosses": [
        "xi (Greek letter)"
      ],
      "links": [
        [
          "xi",
          "xi"
        ]
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "[ksi]"
    }
  ],
  "word": "кси"
}