ピアノを弾いてる

playing the piano

→ ピアノ
phrase Rare #37,552
playing the piano A casual form of ピアノを弾いている, meaning someone is currently playing the piano or regularly does so, depending on context. 弾く is used for playing stringed or keyed instruments.
JA: 毎週土曜日にピアノを弾いてる。
EN: I play the piano every Saturday.

ピアノを弾いてる男性はなんでしょう

Who is the man playing the piano?

ピアノを弾いてる子は僕の妹なんだ

The girl playing the piano is my younger sister.

ピアノを弾いてる

I'm playing the piano.

夕飯の後ピアノを弾いてるんです

I play the piano after dinner.