One day

adverb

At some time in the future.

One day, we'll look back on this and laugh.

Definition 1 of 3

Pro Tip 1/3

Used to express hopes or dreams that someone believes will happen.

One day, I will travel around the world.

Pro Tip 2/3

Indicates a future event without a specific time planned.

One day we should go hiking together.

Pro Tip 3/3

Adds a sense of mystery or change in storytelling.

One day, she discovered the secret door.

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