WordNet sense 1 (not allowed to continue to bat or run):

WordNet sense 2 (discharged as too old for use or work; especially with a pension):

WordNet sense 3 (honorably retired from assigned duties and retaining your title along with the additional title `emeritus' as in `professor emeritus'; `retired from assigned duties' need not imply that one is inactive):

WordNet sense 4 ((used especially of persons) having lived for a relatively long time or attained a specific age):

WordNet sense 5 (not engaged in full-time work):