"altern" meaning in English

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "la",
        "3": "-"
      },
      "expansion": "Latin",
      "name": "uder"
    },
    {
      "args": {},
      "expansion": "",
      "name": "lena"
    }
  ],
  "etymology_text": "Latin alternus.",
  "head_templates": [
    {
      "args": {
        "1": "-"
      },
      "expansion": "altern (not comparable)",
      "name": "en-adj"
    }
  ],
  "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": "English undefined derivations",
          "parents": [
            "Undefined derivations",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 3 entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        }
      ],
      "derived": [
        {
          "word": "altern base"
        }
      ],
      "examples": [
        {
          "ref": "1667, John Milton, “Book CLXXXIX”, in Paradise Lost. […], London: […] [Samuel Simmons], and are to be sold by Peter Parker […]; [a]nd by Robert Boulter […]; [a]nd Matthias Walker, […], →OCLC; republished as Paradise Lost in Ten Books: […], London: Basil Montagu Pickering […], 1873, →OCLC, lines 346-352:",
          "text": "And God made two great lights, great for thir use / To Man, the greater to have rule by day, / The less by night, alterne ; and made the stars, / And set them in the firmament of Heaven / To illuminate the Earth, and rule the day / In their vicissitude, and rule the night, / And light from darkness to divide. […]",
          "type": "quote"
        }
      ],
      "glosses": [
        "Acting by turns; alternate."
      ],
      "id": "en-altern-en-adj-6TGZQSw0",
      "links": [
        [
          "alternate",
          "alternate"
        ]
      ],
      "raw_glosses": [
        "(obsolete) Acting by turns; alternate."
      ],
      "tags": [
        "not-comparable",
        "obsolete"
      ]
    }
  ],
  "word": "altern"
}

{
  "derived": [
    {
      "word": "altern base"
    }
  ],
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "la",
        "3": "-"
      },
      "expansion": "Latin",
      "name": "uder"
    },
    {
      "args": {},
      "expansion": "",
      "name": "lena"
    }
  ],
  "etymology_text": "Latin alternus.",
  "head_templates": [
    {
      "args": {
        "1": "-"
      },
      "expansion": "altern (not comparable)",
      "name": "en-adj"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "adj",
  "senses": [
    {
      "categories": [
        "English adjectives",
        "English entries with incorrect language header",
        "English lemmas",
        "English terms derived from Latin",
        "English terms with obsolete senses",
        "English terms with quotations",
        "English uncomparable adjectives",
        "English undefined derivations",
        "Pages with 3 entries",
        "Pages with entries",
        "Requests for attention in Latin etymologies"
      ],
      "examples": [
        {
          "ref": "1667, John Milton, “Book CLXXXIX”, in Paradise Lost. […], London: […] [Samuel Simmons], and are to be sold by Peter Parker […]; [a]nd by Robert Boulter […]; [a]nd Matthias Walker, […], →OCLC; republished as Paradise Lost in Ten Books: […], London: Basil Montagu Pickering […], 1873, →OCLC, lines 346-352:",
          "text": "And God made two great lights, great for thir use / To Man, the greater to have rule by day, / The less by night, alterne ; and made the stars, / And set them in the firmament of Heaven / To illuminate the Earth, and rule the day / In their vicissitude, and rule the night, / And light from darkness to divide. […]",
          "type": "quote"
        }
      ],
      "glosses": [
        "Acting by turns; alternate."
      ],
      "links": [
        [
          "alternate",
          "alternate"
        ]
      ],
      "raw_glosses": [
        "(obsolete) Acting by turns; alternate."
      ],
      "tags": [
        "not-comparable",
        "obsolete"
      ]
    }
  ],
  "word": "altern"
}