What does liminal mean?

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liminal
ˈlɪmɪn(ə)l/
adjective

technical
adjective: liminal
  1. 1.
    relating to a transitional or initial stage of a process.
  2. 2.
    occupying a position at, or on both sides of, a boundary or threshold.
Origin
late 19th century: from Latin limen, limin- ‘threshold’ +