if a situation, an event or an activity involves something, that thing is an important or necessary part or result of it

if a situation, an event or an activity involves somebody/something, they take part in it or are affected by it

There was a serious incident involving a group of youths.

cases involving the care of young children

We want to involve as many people as possible in the celebrations.

Parents should involve themselves in their child's education.

to say or do something to show that somebody took part in something, especially a crime

His confession involved a number of other politicians in the affair.

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