adj.
Having or involving three sides, countries, or parties.
[From Latin trilaterus : tri-, tri- + latus, later-, side.]
trilaterally tri·lat'er·al·ly adv.
The American Heritage® Dictionary of the English Language, Fourth Edition Copyright © 2007, 2000 by Houghton Mifflin Company. Updated in 2009. Published by Houghton Mifflin Company. All rights reserved.
