There are 2 translations of cien in English:

cien1

adjetivo invariable/invariable adjective, pronombre/pronoun

  • a/one hundred cien euros a/one hundred euros cien mil a/one hundred thousand es cien por cien algodón it's pure cotton, it's a hundred percent cotton no estoy convencido al cien por cien I'm not totally convinced poner a algn a cien (España/Spain) to get sb annoyed ver tb ciento1