1. Make contact or come together
   "The two roads join here";
   - conjoin [formal]
    
2. Cause to become joined or linked
   "join these two parts so that they fit together"
    
3. Become part of; become a member of a group or organization
   "He joined the Communist Party as a young man";
   - fall in
    
4. Come into the company of
   "She joined him for a drink"
    
5. Be or become joined or united or linked
   "Our paths joined";
   - connect, link, link up, unite

1. The shape or manner in which things come together and a connection is made
   "The join between the two pieces of wood was barely visible";
   - articulation, joint, juncture, junction
    
2. A set containing all and only the members of two or more given sets
   "The join of sets A and B includes all elements from both sets";
   - union, sum

Derived forms: joined, joins, joining

Type of: act, bear on, concern, connect, connection, connexion [Brit], get together, have to do with, link, link up, meet, move, pertain, refer, relate, set, tie, touch, touch on

Antonym: disjoin

Encyclopedia: Join, or die