wait up

US colloquial often used in the imperative

To stay awake waiting for somebody to return. / (colloquial, often used in the imperative, US) To wait.

Japanese Meaning

誰かの帰りを眠らずに待つ / 待つ（口語的表現）

I'll wait up for you until you get home.

あなたが帰るまで起きて待っているよ。

Sense（1）

To stay awake waiting for somebody to return.

Anyway, Dad waited up for them. It must have been about midnight when they came in.

Sense（2）

(colloquial, often used in the imperative, US) To wait.

Hey, wait up! I forgot my umbrella.

waits up

（ present singular third-person ）

waiting up

（ participle present ）

waited up

（ participle past ）

waited up

（ past ）