say it: il-OO-muh-nay-ting
illuminating is an adjective meaning "tending to increase knowledge or dissipate ignorance". It carries one recorded sense.
tending to increase knowledge or dissipate ignorance
“an enlightening glimpse of government in action”
“an illuminating lecture”
Definitions, synonyms and semantic relations for illuminating come from Princeton University’s WordNet. The pronunciation comes from the CMU Pronouncing Dictionary. Commonness is measured against a corpus of everyday English. Full sources and licences.