I would use these resources for moments when I think I need to zoom out. I need a definition, a refresh on a debate, some broader themes. Think of these articles as scholarly Wikipedia entries.
Updated irregularly. Includes 241 alphabetically arranged entries on individual critics and theorists, critical and theoretical schools and movements, and the critical and theoretical innovations of specific countries and historical periods. It also treats figures who did not explicitly deal with, but who still deeply affected, literature, literary theory, or literary criticism, as well as figures and kinds of inquiry from other fields that have been shaped by or have themselves shaped literary theory and criticism. Each entry includes a selective primary and secondary bibliography, and there are extensive cross references both within and at the conclusion of each entry. Chronological range extends from Plato and Aristotle to the present, with wide geographical and cultural coverage.
Updated quarterly. Covers words from across the English-speaking world and offers etymological analysis, listings of variant spellings, and phonetic pronunciation. Corresponds to the print Oxford English Dictionary published in 1989 and the three Additions volumes published 1993-1997.