RO

R1O1

proper noun

An a priori international auxiliary language created by Edward Powell Foster beginning in 1904.

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Meanings

RO1

nounRO (countable and uncountable, plural ROs)

plural ROs

  1. abbreviationcountableinitialismuncountableInitialism of reverse osmosis.
  2. abbreviationcountableinitialismuncountableInitialism of restraining order.
  3. abbreviationcountableinitialismuncountablepostalInitialism of receiving office.
proper noun
  1. abbreviationAbbreviation of Rondônia: a state of Brazil.

Ro2

proper nounRo (uncountable)
  1. uncountableAn a priori international auxiliary language created by Edward Powell Foster beginning in 1904.
Cite this entry
APA

RO. (n.d.). In WatkinsX Dictionary. Retrieved November 2, 2026, from https://dictionary.watkinsx.com/word/RO

MLA

“RO.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/RO. Accessed November 2, 2026.

Chicago

WatkinsX Dictionary, s.v. “RO,” accessed November 2, 2026, https://dictionary.watkinsx.com/word/RO.

Source: RO on Wiktionary, CC BY-SA 4.0.