liaison UK /liˈeɪˌzɒ̃/US /liˈeɪˌzɑn/noun 10verb 1forms 3 noun10 •Communication between two parties or groups. •A relayer of information between two forces in an army or during war. •Any person who relays information between two groups or organizations.As a community liaison, I work to make sure the general public knows about our organization's work. •Cooperation, working together. •A tryst; a romantic meeting. •An illicit sexual relationship or affair.ostriches in breeding season are relentlessly promiscuous, with both males and females seeking liaisons with multiple partners. — 2020 •Fusion of two consecutive words and the manner in which this occurs. •The pronunciation of a normally silent final consonant when the next word begins with a vowel. •A thickening for sauces, typically based on egg yolks.[…]prepare a liaison, or four or five yolks of eggs and some cream […] — 1759 •A noncompetitive section in a rally that takes place on public roads, during which competitors have to abide by all relevant traffic laws. verb1 •(nonstandard) Synonym of liaise. formsliaisoned · liaisoning · liaisons