Определение subordinating conjunction в Английский Язык Английский Язык словарь
A word that appears at the beginning of a subordinate clause and establishes its nature
Example: because in I'm staying in because it's raining..
a conjunction (like `since' or `that' or `who') that introduces a dependent clause the subordination that occurs when a conjunction makes one linguistic unit a constituent of another
A subordinating conjunction is a word such as `although', `because', or `when' which begins a subordinate clause. Compare co-ordinating conjunction