A word used to link words, phrases and clauses. Common conjunctions are and, but, or, either... or, neither...nor. These can link 'equal units' such as words, phrases or main clauses. A special kind of conjunction that can link 'unequal' independent and dependent clauses is called a subordinating conjunction. There are many of these, e.g. if, when, where, unless, etc. Also see sentence and clause.