The work of Ernest Gellner continues to be an influential part of nationalism studies. A recent appraisal has raised questions about the argument that Gellner offered in his central text on nationalism, Nations and Nationalism. This article takes up other issues in Gellner's work on nationalism. The article examines Gellner's influential definition of nationalism and the interpretation that he placed on that definition, as well as his treatment of ‘political cohabitation’. It also pays more attention to Gellner's later work, namely, Gellner's discussion of ‘the time zones of nationalism’. The paper draws on secondary literature but its primary purpose is to assess the coherence of Gellner's arguments.