How do you use "set off" in a sentence?

We set off at dawn. What time should we set off? The alarm was set off by accident.

set off

To begin a journey To start traveling somewhere. Also means to trigger something (alarm, explosion).

Phrasal Verb BritishAmericanAustralian ★★★★★ Very Common Neutral

Meaning: To begin a journey

启程，出发

Emprender un viaje

旅に出発する

여행을 시작하다, 출발하다

To start traveling somewhere. Also means to trigger something (alarm, explosion).

开始去某个地方旅行。也可以表示触发某物（如警报、爆炸）。

Comenzar a viajar a algún lugar. También significa activar algo (una alarma, una explosión).

どこかへ向かって出発することを意味します。また、何か（警報、爆発など）を作動させることも意味します。

어딘가로 이동을 시작하다. 또한 무언가를 작동시키다(경보, 폭발 등)라는 뜻도 있다.

Base verb: set

Particle: off

Separable: Yes — the object can go between the verb and particle

We set off at dawn.
我们黎明时出发了
Partimos al amanecer
私たちは夜明けに出発した
우리는 새벽에 출발했다.
What time should we set off?
我们几点出发？
¿A qué hora deberíamos salir?
何時に出発しようか？
몇 시에 출발할까?
The alarm was set off by accident.
警报被意外触发了
La alarma se activó por accidente
警報が誤って鳴った
경보가 실수로 울렸다.

Context: travel, journeys

Tone: practical

From setting oneself off on a path.

Era: Modern

Generation: All ages

Social background: Universal