Meaning of “liaison” - Learner’s Dictionary

liaison

noun uk us /liˈeɪzən/
COMMUNICATION [ U ]

communication between people or groups that work with each other

PERSON [ C ] US

someone who helps groups to communicate effectively with each another:

She served as an informal liaison between employees and management.
RELATIONSHIP [ C ]

a short, secret sexual relationship between people who are not married

(Definition of “liaison” from the Cambridge Learner’s Dictionary © Cambridge University Press)