The meaning of the Acronym RA is...

RA is

• Regular Army
• Rubber Armoring
• Remote Area
• Red Armor
• Rally America
• Military Serial Number prefix for non-drafted Volunteer
• Regiment of Artillerists

More Meanings For RA:

• Return All
• Return Address
• RealAudio Audio file
• Remote Access Data file
• Rapid Access
• Restore Advanced
• Registration Authority
• Review Access
• Registry Agent
• Really Annoying
• Really Awesome
• Radio Activity
• Registered Architect
• Radium
• Radium

RA is also in:

• Amateur Radio
• Architecture
• Assembly
• Chat
• Chemistry
• Electronics
• File Extensions
• General
• Security