Source : WordNet®

enlightening
     adj 1: tending to increase knowledge or dissipate ignorance; "an
            enlightening glimpse of government in action" [syn: {informative},
             {instructive}] [ant: {unenlightening}]
     2: enlightening or uplifting so as to encourage intellectual or
        moral improvement; "the paintings in the church served an
        edifying purpose even for those who could not read" [syn:
        {edifying}] [ant: {unedifying}]
     3: highly enlightening; making understandable or clarifying;
        "an illuminating lecture"; "illuminating pieces of
        information" [syn: {illuminating}] [ant: {unilluminating}]