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1. Of two or more things, to connect physically. The two buildings join together right at the corners of these two walls. The smaller amoebas joined together to create a larger organism.
2. To create a physical connection between two or more different things. In this usage, a noun or pronoun can be used between "join" and "together." Make sure the breaker is off before you join those wires together. We just joined together several smaller pieces of rope to form a single long one.
3. To unite or come into company or association together. Several smaller groups are joining together to file a single lawsuit against the corporation. It was wonderful to see our two families joining together for such a fun vacation.
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 "together." The CEO said he would like to join the two companies together within the next five years. The controversial legislation has at least succeeded in joining together multiple groups of activists that would normally be opposed to one another.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
join (something and something else) together
to connect or unite things. We joined the pipe and the hose together. He joined together all the blue wires and the red ones.
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs. © 2002 by The McGraw-Hill Companies, Inc.