What is "grr"

alt. A growl of anger or disappointment. interj. A growl of anger or disappointment.

GRR or grr may refer to:

• ANOVA gauge R&R, gauge repeatability and reproducibility, a statistical measure of the precision of a measurement system
• Gainesville Roller Rebels, a roller derby league based in Florida
• Great River Road, a series of roads which follow the Mississippi River
• Gerald R. Ford International Airport, IATA code GRR, in Grand Rapids, Michigan
• Grand Rapids (Amtrak station), station code GRR, in Grand Rapids, Michigan
• Agroar – Trabalhos Aéreos, ICAO airline code GRR, based in Portugal
• The Taznatit language, ISO 639-3 code
• Glycine rich region, a stretch of a protein containing multiple copies of the amino acid glycine
• Grothendieck–Riemann–Roch theorem
• Guanine-rich region, a stretch of DNA containing multiple copies of the nucleotide guanine
• Grr, an onomatopoeia for growling, also spelled grrr