Meaning : Serving to connect two grammatical constituents of identical construction.
Example :
`and' in `John and Mary' or in `John walked and Mary rode' is a coordinating conjunction; and so is `or' in `will you go or stay?'.
Synonyms : coordinating
Serving to connect a subordinate clause to a main clause.
`when' in `I will come when I can' is a subordinating conjunction.