Western Style
noun, な adjective, の adjective
Remember how 風 can mean "style" as in 和風? Well, this is now Western style style, more simply put as Western style.
This is a jukugo word, which usually means on'yomi readings from the kanji. If you know the readings of your kanji you'll know how to read this as well.
バターを入れて、うどんを洋風にアレンジしました。
I put butter in udon to give it a western-style twist.
えっ、日本のアーティストの曲なの？なんだか洋風なメロディだね。
Oh, is it a song from a Japanese artist? It sounded kind of like a western-style melody.
私の家は、家具を全て洋風に揃えているので、畳はありません。
My house is entirely furnished in the Western style, so there are no tatami mats.