From Longman Dictionary of Contemporary Englishtwo-starˈtwo-star adjective [only before noun] DLTa two-star hotel, restaurant etc has been judged to be of a medium standard
Examples from the Corpus
two-star• We stayed in the Hotel du Bourg, which offers two-star accommodation on a bed-and-breakfast basis.• Within two weeks of the attack, both men were relieved of their commands and automatically demoted to two-star rank. 