- Bond rating.
We assign each item inspected a rating from A through G, depending on various factors.
I was so happy to get an A on that test.
Orchestras traditionally tune to a concert A.
Origin of a-b
- From Middle English and Old English upper case letter A and split of Middle English and Old English upper case letter Æ.
- (highest rank, grade, music): From the initial position of the letter A in the English alphabet.
- (vehicle-distinguishing signs): From Australia
- (blood type): From A antigen