- the act of joining.
- the act of joining, esp in legal contexts
- (in pleading) the stage at which the parties join issue (joinder of issue)
- the joining of two or more persons as coplaintiffs or codefendants (joinder of parties)
- the joining of two or more causes in one suit
“act of joining together” (usually in specific legal senses), c.1600, from French joindre “to join,” taken as a noun (see join).