join with (someone or something)
1. To connect or merge physically with something else. This is where the new law building joins with the original one. First, locate the point at which the power cable joins with the mainframe.
2. To connect something physically with something else. In this usage, a noun or pronoun is used between "join" and "with." Make sure the breaker is off before you join the red wire with the blue one. I decided to tear the fence down and join my lawn with my neighbor's.
3. To unite or come into association with someone or some group. Our group is joining with several others in this lawsuit against the company. Several large corporations are joining with the protesters in opposition to the controversial legislation.
4. To unite or put into association two or more different people, groups, organizations, etc. In this usage, a noun or pronoun can be used between "join" and "with." The agency finally joined the child with her family after the incident. The conference joins enthusiasts with like-minded people from around the world. I'm so excited to be joining my small startup with such a massive company. It will give us the means to do incredible work!
join (someone) with (someone else)and join (something) with (something else)
to connect things or people. I joined Fred with the others. We joined the older puppies with the full-grown dogs.
join (up) with someone or something
to bring oneself into association with someone or something. I decided to join up with the other group. Our group joined with another similar group.