BRB Definition

abbreviation
Alternative capitalization of BRB (be right back).
Wiktionary
(Internet slang) (I'll) Be right back.
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(archaeology) Bevelled-rim bowl or bevel-rimmed bowl.
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Buckling restrained brace A specialized seismic bracing system for buildings and other structures. Braces used as part of a buckling-restrained braced frame (BRBF)
Wiktionary