1Being expensive or highly valued — a somewhat more formal na-adjective than 高い, used to describe goods or items with a high price.
これは高価な腕時計だから扱いに注意してね。
This is an expensive watch, so please handle it carefully.
高価な買い物をする前にはよく考えたほうがいい。
You should think it over carefully before making an expensive purchase.
高価だが品質は申し分ない。
It's expensive, but the quality is impeccable.