From Longman Dictionary of Contemporary Englishthrow something openthrow something opena) PUBLIC/NOT PRIVATEto allow people to go into a place that is usually kept privatethrow something open to Plans have been announced to throw the Palace open to the public. b) LET/ALLOWto allow anyone to take part in a competition or a discussionthrow something open to I would now like to throw the debate open to our audience. → throw