straight A in English dictionary straight A Meanings and definitions of "straight A" Consistently high grades or marks. Pertaining to one who makes straight A's. adjective (education) Pertaining to one who makes straight As. noun (education) Grades or marks that are consistently A's. more Grammar and declension of straight A straight A ( not comparable) straight A ( plural straight As or straight A's) straight A (not comparable) straight A's pl (plural only) more Sample sentences with "straight A" Declension Stem Match words all exact any Try again Authors