all of a sudden (Meaning)

Wordnet

all of a sudden (r)

without warning

happening unexpectedly

No weak antonyms found.

All of a sudden, the lights went out, plunging the room into darkness.
We were enjoying a peaceful picnic, and all of a sudden, a loud noise startled us.
The car came to a screeching halt, and all of a sudden, there was smoke coming from the engine.
The quiet forest was disrupted when, all of a sudden, a group of birds took flight, creating a cacophony of sounds.
All of a sudden, a gust of wind blew in, sending papers flying around the office.
We were walking along the beach, and all of a sudden, a massive wave crashed against the shore.
The cat was peacefully sleeping, and all of a sudden, it jumped up, startled by a noise outside.
The meeting was proceeding smoothly, and all of a sudden, the fire alarm went off, causing everyone to evacuate.
The child was playing in the park, and all of a sudden, a burst of laughter erupted from a nearby group of friends.
The music was playing softly, and all of a sudden, the volume increased, surprising everyone in the room.

without warning, happening unexpectedly

suddenly, unexpectedly, aback, unawares, abruptly,unaware, unanticipatedly, surprisingly, amazingly,off base

tardily, obviously,slowly, sluggishly, sluggishly, leisurely, obviously, tardily, leisurely, slowly

All of a sudden, the lights went out, plunging the room into darkness.

We were enjoying a peaceful picnic, and all of a sudden, a loud noise startled us.

The car came to a screeching halt, and all of a sudden, there was smoke coming from the engine.

The quiet forest was disrupted when, all of a sudden, a group of birds took flight, creating a cacophony of sounds.