what is the definition of once?

Learn Definition of once from the DictAbc Dictionary, How to use once in a Example Sentence.

once Definition In English

0 one single time:
- I've only played rugby the once, and I never want to play it again.
- An opportunity as good as this arises once in a lifetime.
- Our intention is to destroy their offensive capability once and for all.
- We meet for lunch once in a while.
- I've seen him once or twice in town.
- When my father came home, everything felt right once more.
- I'd like to visit the campus once more before we leave.
- Once again, racist attacks are increasing across Europe.
- All right, I'll lend you the money - just this once.
- For once, the bus came on time.
- They all started talking at once.
- We have lunch together once a month.
- I went sailing once, but I didn't like it.
1 in the past, but not now:
- Once-thriving villages stand deserted and in ruins.
- Computers are much cheaper nowadays than they once were.
- This house once belonged to my grandfather.
2 as soon as, or from the moment when:
- I knew at once that I'd like it here.
- Remember that you won't be able to cancel the contract once you've signed.
- Once I've found somewhere to live I'll send you my address.
3 on or at a single time:
- Going to the Olympics is a once-in-a-lifetime opportunity (= a rare and valuable one).
- The book club meets once a month.
- I went to Disney World once.
4 in the past, but not now:
- Computers are much cheaper now than they once were.
- I lived in Milwaukee once.
5 as soon as, or when:
- Once you’ve tried their ice cream, you’ll be back for more.

They can then be easily picked up with a small moistened paint-brush and transferred at once to the alcohol in the collecting tubes.
These relations are thus indicated twice: once for the human and once for the computer.
Once again, the stimulus will be sufficient to force the correct perception.
Thus, once the partitioning of the domain is done, the determination of the 'best' function is straightforward.
In this book several main themes are at once apparent.
Holmes once again effectively examines gendered language in the workplace and provides clear ties to current theoretical frameworks.
Rate of taper could be slowed once for every 3-day decrement if re-emergent symptoms were too severe for patients to go on.
Once determined that the intersected point belongs to visible surfaces, it is necessary to determine if the point detected is within the parallelepiped boundaries.