conditional clause - definition and synonyms

noun [countable]  /kənˌdɪʃ(ə)nəl ˈklɔːz/
singularconditional clause
pluralconditional clauses
  1. linguistics a subordinate clause that usually begins with a conjunction such as ‘if’ or ‘unless’, and states possible situations and events, while the independent clause states their results, for example in the sentences 'All these courses are free if you are a student or unemployed’ and ‘Unless immediate action is taken, more lives will be lost