supplementary plane

noun

Any of the 16 Unicode planes located above Plane 0 (the BMP) and requiring the use of surrogate pairs to encode in UTF-16 (Planes 1 through 16, collectively covering the range of code points from U+10000 through U+10FFFF).

Similar
astral plane
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Meanings

nounsupplementary plane (plural supplementary planes)

plural supplementary planes

  1. Any of the 16 Unicode planes located above Plane 0 (the BMP) and requiring the use of surrogate pairs to encode in UTF-16 (Planes 1 through 16, collectively covering the range of code points from U+10000 through U+10FFFF).

    Synonyms: astral plane

Synonyms & antonyms

nounAny of the 16 Unicode planes located above Plane 0 (the BMP) and requiring the use of surrogate pairs to encode in UTF-16 (Planes 1 through 16, collectively covering the range of code points from U+10000 through U+10FFFF).

Similar
astral plane
Cite this entry
APA

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

MLA

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

Chicago

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

Source: supplementary plane on Wiktionary, CC BY-SA 4.0.