a channel for communication between groups
"he provided a liaison with the guerrillas"
Communication between two parties or groups.
"The manager established a liaison to ensure clear communication between the marketing team and the sales department."
In plain English: A liaison is someone who acts as a messenger to connect two different groups and make sure they communicate properly.
"The office liaison will meet with our clients every morning to discuss their progress."
Usage: Use liaison to describe an official role that facilitates communication and coordination between different departments, teams, or organizations. This term is often confused with the French word meaning a social connection, but in business contexts it specifically refers to active mediation rather than mere acquaintance.
To liaise.
"The new manager established a liaison between the engineering team and the marketing department to ensure seamless communication on the product launch."
The word "liaison" comes directly from French, where it originally meant a binding or connection. It traveled into English to describe the same concept of linking things together without changing its core meaning.