UK:*UK and possibly other pronunciationsUK and possibly other pronunciations/ɪkˈspleɪn/US:USA pronunciation: IPA and respellingUSA pronuncation: IPA/ɪkˈspleɪn/ ,USA pronunciation: respelling(ik splān)

WordReference Collins English Usage © 2020
If you explain something, you give details about it so that it can be understood.
The head teacher should be able to explain the school's teaching policy.
You say that you explain something to someone.
Let me explain to you about Jackie.
We explained everything to the police.
Be careful
You must use to in sentences like these. Don't say, for example, ‘Let me explain you about Jackie’.
You can use explain with a that-clause to say that someone tells someone else the reason for something.
I explained that I was trying to write a book.
'explain' also found in these entries:

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