say it: LEK-chur-ing
lecturing is a noun meaning "teaching by giving a discourse on some subject (typically to a class)". It carries one recorded sense.
teaching by giving a discourse on some subject (typically to a class)
Forms marked · are formed by the regular rule rather than recorded in the source data. English keeps a few hundred irregulars and the rest follow the pattern, so the rule is right far more often than not — but it is a rule, and the mark says so.
Definitions, synonyms and semantic relations for lecturing 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.