noun
excellence; preeminence; distinction
Used in grading or evaluation contexts to denote a level above 優 (excellent); often seen in academic or performance ratings.
彼の成績は秀だった。
His grade was 'excellent' (the highest mark).
この作品は審査員から秀の評価を受けた。
This work received a rating of 'excellent' from the judges.
良 means 'good' and is typically below 優 and 秀.
The kanji 秀 carries meanings of 'excellent' or 'outstanding'. The reading しゅう is the on'yomi, used in this noun form.