li·ai·son (lē-āzŏn′, lēā-)
a. An instance or a means of communication between different groups or units of an organization, especially in the armed forces.
b. One that maintains communication: served as the president's liaison with Congress.
2. A sexual relationship, especially when at least one person is married or involved in a sexual relationship with someone else.
3. Linguistics Pronunciation of the usually silent final consonant of a word when followed by a word beginning with a vowel, especially in French.
intr.v. li·a·soned, li·a·son·ing, li·a·sons
To serve as a liaison.
[French, from Old French, from Latin ligātiō, ligātiōn-, from ligātus, past participle of ligāre, to bind; see LIGATE.]
The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2017 by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
The American Heritage Dictionary Blog
Check out our blog, updated regularly, for new words and revised definitions, interesting images from the 5th edition, discussions of usage, and more.
American Heritage Dictionary Products
The American Heritage Dictionary, 5th Edition
The American Heritage Dictionary of Idioms
The American Heritage Roget's Thesaurus
Curious George's Dictionary
The American Heritage Children's Dictionary
The American Heritage Dictionary of Indo-European Roots
The American Heritage Student Grammar Dictionary
The American Heritage Desk Dictionary + Thesaurus
The American Heritage Science Dictionary
The American Heritage Dictionary of Business Terms
The American Heritage Student Dictionary
The American Heritage Essential Student Thesaurus