What does AA heavy mean on the back of silverware?

"AA heavy" on the back of silverware typically indicates that the piece is made of stainless steel and has been plated with a higher quality silver, often referred to as "AA" grade. The term "heavy" suggests that the silverware has a thicker layer of silver plating, resulting in a more durable and long-lasting finish. This marking is often associated with better-quality flatware compared to standard silver-plated items.