There are about ten apples in the basket.

Approximately or nearly in quantity or number.
The meeting will start in about five minutes.
She has about twenty books on her shelf.
I will arrive in about an hour.
about five
about ten
about twenty
approximately
nearly
roughly
The book is about science.

In relation to a particular subject or topic.
She asked me about my hobbies.
We talked about the weather.
He is curious about history.
about time
about the issue
about the topic
regarding
concerning
relating to
We talked about the movie.

In relation to a subject or topic.
She is curious about the project.
He asked about the weather.
They are excited about the trip.
think about
worry about
learn about
regarding
concerning
in relation to
We talked about the movie.

Used to indicate the subject of something or the topic being discussed.
She asked about the weather.
He read a book about history.
They had a discussion about the project.
talk about
think about
worry about
regarding
concerning
on the subject of
We had a debate about the best movie of the year.

Used to indicate the topic of discussion or consideration.
She told me about her trip.
We talked about the weather.
He asked about the homework.
about time
about to
talk about
regarding
concerning
on the subject of