Definition
Referring to something that existed or happened in the past but is no longer the case.
Example
The once bustling town is now quiet and empty.
Conversation

Did you know that this building was the once capital of the country?

Really? I had no idea it had such a history.

Yeah, it’s interesting how things change over time.

For sure! It makes you appreciate the past even more.
Synonyms & Antonyms
Definition
At a single time; one time only.
Example
I visited that museum once when I was a child.
Conversation

I visited that new coffee shop once last week.

It was great! I think I’ll go again once I have some free time.
Definition
At the time that something happens; as soon as something occurs.
Example
Once the sun sets, it gets dark quickly.
Conversation

Do you remember that time we went hiking?

Yeah, it was so much fun!

We should do it again once the weather gets better.
Definition
A single occurrence or event; one time.
Example
I only visited that place once during my vacation.
Conversation

Do you remember that time we went hiking in the mountains?

Yeah, I loved it! We should do that once more this summer.

Definitely! It was such a great adventure.
Root Explanation
Once → This word originates from Old English 'ānce', meaning one time or a single occasion. It refers to something happening a single time.
Memory Tip
Think of 'one' to remember that 'once' means something that happens a single time.
Visually Confused Words
ponce
ounce
nonce
bonce
one
sconce
rounce
roncet