subordinating conjunction is a noun meaning "the subordination that occurs when a conjunction makes one linguistic unit a constituent of another". It carries 2 recorded senses.
the subordination that occurs when a conjunction makes one linguistic unit a constituent of another
a conjunction (like `since' or `that' or `who') that introduces a dependent clause
Definitions, synonyms and semantic relations for subordinating conjunction come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.