To include or to engage someone or something.

शामिल करना

English Usage: We need to involve more people in the discussion.

Hindi Usage: हमें चर्चा में अधिक लोगों को शामिल करने की आवश्यकता है।

The state of being involved or participating in an activity or event.

संलग्नता

English Usage: His involvement in the project led to its success.

Hindi Usage: उसकी संलग्नता परियोजना की सफलता का कारण बनी।