lower boundary

noun

The most ancient time encompassed by a given geological period.

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Meanings

nounlower boundary (plural lower boundaries)

plural lower boundaries

  1. geographyThe most ancient time encompassed by a given geological period.
  2. human sciencesThe most recent time encompassed by a given period of time.
Cite this entry
APA

lower boundary. (n.d.). In WatkinsX Dictionary. Retrieved November 4, 2026, from https://dictionary.watkinsx.com/word/lower%20boundary

MLA

“lower boundary.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/lower%20boundary. Accessed November 4, 2026.

Chicago

WatkinsX Dictionary, s.v. “lower boundary,” accessed November 4, 2026, https://dictionary.watkinsx.com/word/lower%20boundary.

Source: lower boundary on Wiktionary, CC BY-SA 4.0.