1 if a situation, an event or an activity involves sth, that thing is an important or necessary part or result of it
SYNENTAIL:
[VN] Any investment involves an element of risk. * Many of the crimes involved drugs. * [V-ing] The test will involve answering questions about a photograph. * [VN-ing] The job involves me travelling all over the country. * (formal) The job involves my travelling all over the country.
2 [VN] if a situation, an event or an activity involves sb, they take part in it or are affected by it:
There was a serious incident involving a group of youths. * How many vehicles were involved in the crash?
3 [VN] ~ sb (in sth / in doing sth) to make sb take part in sth:
We want to involve as many people as possible in the celebrations. * Parents should involve themselves in their child's education.
4 [VN] ~ sb (in sth) to say or do sth to show that sb took part in sth, especially a crime
SYNIMPLICATE:
His confession involved a number of other politicians in the affair.
PHRASALVERBS
involve sb in sth to make sb experience sth, especially sth unpleasant:
You have involved me in a great deal of extra work.
