The meaning of the Acronym FRL is...

FRL is

• Full Reservoir Level

More Meanings For FRL:

• Fire Resistance Level
• Library (GP-Forth)
• Frame Reference Line
• Fuselage Reference Line
• Full Reservoir Level
• Federal Register Log
• Fräulein
• Fruitcake Resistance League
• Filter Regulator Lubricator
• Frederick R Lorenz

FRL is also in:

• Architecture
• File Extensions
• Funnies
• German
• NASA
• State and Local
• Unfiled
• US Government