"M-shaped" meaning in English

{
  "head_templates": [
    {
      "args": {
        "1": "-"
      },
      "expansion": "M-shaped (not comparable)",
      "name": "en-adj"
    },
    {
      "args": {
        "1": "en",
        "2": "possessional"
      },
      "expansion": "(possessional)",
      "name": "tlb"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "adj",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English 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": "en",
          "name": "Shapes",
          "orig": "en:Shapes",
          "parents": [
            "Geometry",
            "Mathematics",
            "Formal sciences",
            "Sciences",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "Shaped like the capital letter \"M\"."
      ],
      "id": "en-M-shaped-en-adj-qI6Kmh5O",
      "links": [
        [
          "Shaped",
          "shaped"
        ],
        [
          "M",
          "M"
        ]
      ],
      "related": [
        {
          "word": "A-shaped - B-shaped - C-shaped - D-shaped - E-shaped - F-shaped - G-shaped - H-shaped - I-shaped - J-shaped - K-shaped - L-shaped - M-shaped - N-shaped - O-shaped - P-shaped - Q-shaped - R-shaped - S-shaped - T-shaped - U-shaped - V-shaped - W-shaped - X-shaped - Y-shaped - Z-shaped"
        }
      ],
      "tags": [
        "not-comparable"
      ]
    }
  ],
  "word": "M-shaped"
}

{
  "head_templates": [
    {
      "args": {
        "1": "-"
      },
      "expansion": "M-shaped (not comparable)",
      "name": "en-adj"
    },
    {
      "args": {
        "1": "en",
        "2": "possessional"
      },
      "expansion": "(possessional)",
      "name": "tlb"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "adj",
  "related": [
    {
      "word": "A-shaped - B-shaped - C-shaped - D-shaped - E-shaped - F-shaped - G-shaped - H-shaped - I-shaped - J-shaped - K-shaped - L-shaped - M-shaped - N-shaped - O-shaped - P-shaped - Q-shaped - R-shaped - S-shaped - T-shaped - U-shaped - V-shaped - W-shaped - X-shaped - Y-shaped - Z-shaped"
    }
  ],
  "senses": [
    {
      "categories": [
        "English 2-syllable words",
        "English adjectives",
        "English compound adjectives",
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English possessional adjectives",
        "English terms derived from the shape of letters",
        "English uncomparable adjectives",
        "Pages with 1 entry",
        "Pages with entries",
        "en:Shapes"
      ],
      "glosses": [
        "Shaped like the capital letter \"M\"."
      ],
      "links": [
        [
          "Shaped",
          "shaped"
        ],
        [
          "M",
          "M"
        ]
      ],
      "tags": [
        "not-comparable"
      ]
    }
  ],
  "word": "M-shaped"
}