1. taking part in something; participating
2. complicated or difficult to understand
3. emotionally committed or deeply interested

Examples

• She was involved in planning the school fundraiser.
• The math problem was too involved for me to solve quickly.
• He became deeply involved in environmental activism.
• All students involved in the project received extra credit.
• The plot of the novel was quite involved and hard to follow.
• Parents should stay involved in their children's education.
• The involved process required several steps to complete.