rb

R1B3

Abbreviation of reply back.

Similar
rubidiumatomic number 37
CommonScrabble 4
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Meanings

rb1

phrase
  1. Internetabbreviationinformalchiefly SnapchatAbbreviation of reply back.

RB2

nounRB (plural RBs)

plural RBs

  1. abbreviationinitialismAmerican footballInitialism of running back.
  2. abbreviationAbbreviation of reblog.
  3. abbreviationgamesAbbreviation of Roblox.

Synonyms & antonyms

nouna soft silvery metallic element of the alkali metal group; burns in air and reacts violently in water; occurs in carnallite and lepidolite and pollucite

Similar
rubidiumatomic number 37
Broader
metallic elementmetal
Also see
rubidiumrunning back

Synonym sets from Open English WordNet, CC BY 4.0.

Cite this entry
APA

rb. (n.d.). In WatkinsX Dictionary. Retrieved November 3, 2026, from https://dictionary.watkinsx.com/word/rb

MLA

“rb.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/rb. Accessed November 3, 2026.

Chicago

WatkinsX Dictionary, s.v. “rb,” accessed November 3, 2026, https://dictionary.watkinsx.com/word/rb.

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