Moving or permitting movement in one direction only: a one-way street. (adjective)
Providing for travel in one direction only: a one-way ticket. (adjective)
American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Use "one-way" in a sentence
"Whereas some two-way links between cap-and-trade systems may thus take more time to establish, in the near-term one-way links between cap-and-trade and credit systems likely will be more attractive and easier to establish."
"As service-and-information production becomes more industrialized, concentrated, bureaucratized, and automated, more and more service-and-information-producing organizations begin to operate behind what might be called one-way communication mirrors."
"Corporations are what asset-protection gurus call one-way or unidirectional protection devices."