Join

1. To combine more than one item into one; to put together. The girls on the left will join with the ones on the right.
2. To come together; to meet. Our wives will join us for dinner tonight.
3. To come into the company of. I will join you in watching the football game.
4. To become a member of. We shall join the army after college.
5. To meet and merge with. That is where the creek joins the river.