INVOLVE

[verb] [T] - to include (someone or something) in something, or to make them take part in or feel part of itThe second accident involved two cars and a lorry.Do we need to involve someone from the computer department at this stage in our discussions?The four men were all involved in organising and carrying out the murders. [+ object + verb-ing]The new system involves little, if any, new technology.The operation involves putting a small tube into your heart. [+ verb-ing]Research involving the use of biological warfare agents is supposed to be only for defensive purposes.The President said a future government would be formed after a national conference involving all rebel groups.Criminal law involves acts which are considered harmful to society as a whole, such as murder.She's been involved with animal rights for many years.It would be difficult not to involve the child's father in the arrangements.She was so involved in the play that she cried in the final act.They've been involved (= having a relationship, possibly sexual) for several years.