say it: IL-i-sit-lee
illicitly is an adverb meaning "in a manner disapproved or not allowed by custom". It carries 2 recorded senses.
in a manner disapproved or not allowed by custom
“He acted illegitimately when he increased the rent fourfold”
Definitions, synonyms and semantic relations for illicitly 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.