"mullu" meaning in Estonian

{
  "head_templates": [
    {
      "args": {
        "1": "et",
        "2": "adverbs",
        "3": "not comparable",
        "4": "",
        "5": "",
        "6": "",
        "f1accel-form": "comparative",
        "head": ""
      },
      "expansion": "mullu (not comparable)",
      "name": "head"
    },
    {
      "args": {},
      "expansion": "mullu (not comparable)",
      "name": "et-adv"
    }
  ],
  "lang": "Estonian",
  "lang_code": "et",
  "pos": "adv",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Estonian entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "et",
          "name": "Time",
          "orig": "et:Time",
          "parents": [
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "last year"
      ],
      "id": "en-mullu-et-adv-J5O0kYXj",
      "links": [
        [
          "last year",
          "last year"
        ]
      ],
      "synonyms": [
        {
          "word": "eelmisel aastal"
        }
      ],
      "tags": [
        "not-comparable"
      ]
    }
  ],
  "word": "mullu"
}

{
  "head_templates": [
    {
      "args": {
        "1": "et",
        "2": "adverbs",
        "3": "not comparable",
        "4": "",
        "5": "",
        "6": "",
        "f1accel-form": "comparative",
        "head": ""
      },
      "expansion": "mullu (not comparable)",
      "name": "head"
    },
    {
      "args": {},
      "expansion": "mullu (not comparable)",
      "name": "et-adv"
    }
  ],
  "lang": "Estonian",
  "lang_code": "et",
  "pos": "adv",
  "senses": [
    {
      "categories": [
        "Estonian adverbs",
        "Estonian entries with incorrect language header",
        "Estonian lemmas",
        "Pages with 1 entry",
        "Pages with entries",
        "et:Time"
      ],
      "glosses": [
        "last year"
      ],
      "links": [
        [
          "last year",
          "last year"
        ]
      ],
      "synonyms": [
        {
          "word": "eelmisel aastal"
        }
      ],
      "tags": [
        "not-comparable"
      ]
    }
  ],
  "word": "mullu"
}