 The present entry clarifies the basic idea of alienation. It distinguishes alienation from some adjacent concepts; in particular, from ‘fetishism’ and ‘objectification’. And it elucidates some conceptual and normative complexities, including: the distinction between subjective and objective alienation; the need for a criterion by which candidate separations can be identified as problematic; and (some aspects of) the relation between alienation and ethical value. The empirical difficulties often generated by ostensibly philosophical accounts of alienation are acknowledged, but not resolved.