A word class that describes qualities or states of nouns; in Japanese grammar this often refers specifically to i-adjectives (e.g. 高い, 楽しい).
「楽しい」は形容詞の一つです。
"Tanoshii" is an example of an adjective.
形容詞は名詞の性質や状態を表します。
Adjectives express the qualities or states of nouns.
日本語の文法では「形容詞」はい形容詞を指すことが多いです。
In Japanese grammar, 'keiyoushi' often refers to i-adjectives.