先約があります

I have a prior engagement

→ 先約
phrase Rare #30,448
I have a prior engagement A polite way to say you already have plans or an appointment. The subject is often omitted and understood from context.
JA: すみません、今夜は先約があります。
EN: Sorry, I already have plans tonight.

先約があります。

I have a prior engagement.

残念ながら先約があります。

Unfortunately, I already have plans.

申し訳ありませんが明日は先約があります。

I'm sorry, but I already have plans tomorrow.

今度の日曜日に何か先約がありますか。

Do you have any prior plans this coming Sunday?

残念ですが、私には先約があります。

Unfortunately, I already have plans.