Definition of "join" in English

verb

1. (transitive) To connect or combine into one; to put together.

   • The plumber joined the two ends of the broken pipe.
   • We joined our efforts to get an even better result.

2. (intransitive) To come together; to meet.

   • Parallel lines never join.
   • These two rivers join in about 80 miles.

3. (intransitive) To enter into association or alliance, to unite in a common purpose.

4. (transitive) To come into the company of.

   • I will join you watching the football game as soon as I have finished my work.

5. (transitive) To become a member of.

   • Many children join a sports club.
   • Most politicians have joined a party.

6. (computing, databases, transitive) To produce an intersection of data in two or more database tables.

   • By joining the Customer table on the Product table, we can show each customer's name alongside the products they have ordered.

7. To unite in marriage.

8. (obsolete, rare) To enjoin upon; to command.

9. To accept, or engage in, as a contest.

   • to join encounter, battle, or issue

noun

1. An act of joining or the state of being joined; a junction or joining.

2. An intersection of piping or wiring; an interconnect.

3. (computing, databases) An intersection of data in two or more database tables.

4. (computing) The act of joining something, such as a network.

5. (algebra) The lowest upper bound, an operation between pairs of elements in a lattice, denoted by the symbol ∨.