say it: lee-AY-zahn
liaison is a noun meaning "a usually secretive or illicit sexual relationship". It carries 2 recorded senses.
a usually secretive or illicit sexual relationship
a channel for communication between groups
“he provided a liaison with the guerrillas”
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 liaison 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.