The meaning of the Acronym AAR is...

AAR is

• Association of American Railroads
• The Association Of American Railroads

More Meanings For AAR:

• Automatic Alternate Routing
• Arbitrary Angle Reduction
• Affirmative Action Review
• Anime Academy Radio
• AST / ALT Ratio
• Aortic Aneurysm Repair
• Against All Risks
• A M R Corporation
• after action review
• After Action Report
• Association of American Railroads
• After Action Review
• Air To Air Refueling
• All American Rejects
• After Action Review

AAR is also in:

• FDA
• Funnies
• General
• Laboratory
• Mathematics
• Military
• NASA
• NYSE Symbols
• Physiology
• Telecom
• Universities