On the ball means alert, noticing things and reacting in time: The receptionist was on the ball and noticed the booking error immediately. It's praise for practical attentiveness. In the negative, it's an honest admission: I wasn't on the ball this morning means I was slow and missed things.
When would you say on the ball?
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be on the ball; stay on the ball
- The receptionist was on the ball and noticed the booking error immediately.
- You need to stay on the ball when several deliveries arrive together.
- I was not on the ball this morning and missed the changed meeting time.
What changed
First versionOur new coordinator is on a ball and spots problems early.
RevisionOur new coordinator is on the ball and spots problems early.
A ball is just any ball, so a seems natural. But the idiom only uses the: on the ball. With a, it sounds like literally standing on some ball. Replace a with the.
In the loop means being kept informed, but you can know everything and still react slowly. On the ball means noticing and acting in time. Don't mix it up with the ball is in your court: there, the ball means whose turn it is.
Your turn
She noticed the duplicate order before it was sent, so she was clearly ___ the ball.
Show the answer
on — Spotting an error before it goes out means being on the ball. In the ball isn't English.
Praise a coworker or friend who spotted a problem in time. Use on the ball.
Mina was on the ball and checked the platform change before we boarded the wrong train.
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