{
  "id": "period.temporal",
  "term": "period",
  "sense": "temporal",
  "pos": "noun",
  "status": "review",
  "level": 3,
  "arena": "geometry",
  "domain": "everyday",
  "style": null,
  "definition": "a part of time that is between both boundaries",
  "folk_gloss": null,
  "emergence": {
    "components": [
      "time.dimension",
      "boundary.limit",
      "part.relation"
    ],
    "interaction": "the time that is between both boundaries is a part of time",
    "novel_properties": [
      "bounded segment",
      "distinct part"
    ]
  },
  "examples": [
    {
      "text": "The Jurassic period spanned from 201.3 to 145 million years ago, bounded by mass extinctions.",
      "domain": "geology"
    },
    {
      "text": "The 2020 U.S. presidential transition period lasted exactly 79 days, from Election Day to Inauguration Day.",
      "domain": "institutions"
    },
    {
      "text": "A 90-minute REM sleep period repeats cyclically, bounded by the start of sleep and waking.",
      "domain": "biology"
    }
  ],
  "relations": [
    {
      "id": "time.dimension",
      "note": "",
      "type": "is-a"
    }
  ],
  "used_by": [
    "calendar.tool",
    "climate.weather",
    "rhythm.temporal",
    "spring.season",
    "thursday.temporal"
  ],
  "forms": [
    "period",
    "periods"
  ],
  "closed": true,
  "provenance": {
    "author": "openrouter:openai/gpt-oss-120b",
    "date": "2026-07-29",
    "confidence": 0.6
  },
  "canonical": "https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-period.temporal"
}