na-adjective, noun which may take the genitive case particle 'no', noun
excessive; immoderate; too much
Describes something that goes beyond a reasonable or appropriate limit. Often used in formal or written contexts, and can modify nouns with な or の.
過度な飲酒は健康に悪い。
Excessive drinking is bad for your health.
過度の期待は禁物だ。
You should avoid excessive expectations.
Compound of 過 (exceed, go beyond) and 度 (degree, limit). The combination straightforwardly means 'exceeding the proper degree'.