Conspicuous or striking; clearly noticeable — used for differences, trends, effects, etc.
近年、夏の猛暑化が顕著になっている。
In recent years, the intensification of summer heat has become noticeable.
新薬の効果は被験者間で顕著に異なった。
The new drug's effects differed markedly among the subjects.
成績の差が顕著で、追加の指導が必要だ。
The difference in grades is striking, and additional instruction is necessary.