ar·gu·able [arguable] BrE [ˈɑːɡjuəbl] NAmE [ˈɑːrɡjuəbl] adjective (formal) 1. that you can give good reasons for •It is arguable that giving too much detail may actually be confusing. •He had a good arguable case. 2. not certain; that you do not accept without question Syn: ↑debatable •It is arguable whether the case should have ever gone to trial (= perhaps it should not have).