A1, the
From Longman Dictionary of Contemporary EnglishA1, thethe A1A1, the /ˌeɪ ˈwʌn/ a main British road that goes from London to EdinburghFrom Longman Business DictionaryA1A1 (also A-1, A-one) adjectiveINSURANCE in the LLOYDS REGISTER OF SHIPPING, an A1 ship is of the highest quality or in excellent conditionSYNFIRST CLASS