先約があります

I have a prior engagement

→ 先約
phrase Rare #26,512
I have a prior engagement A polite way to say that you already have plans or an appointment, often as a reason for declining an invitation. Literally, it means that a prior commitment exists.
JA: 申し訳ありませんが、土曜日は先約があります。
EN: I'm sorry, but I have a prior engagement on Saturday.

今度の日曜日に何か先約があります

Do you have any prior plans this coming Sunday?

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.

残念ですが私には先約があります

Unfortunately, I already have plans.

先約があります

I have a prior engagement.