The meaning of the Acronym RA is...

RA is

• Right Ascension
• Right Aft
• Range Area
• Radium
• Radar Altimeter (R/A preferred)

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