Definitions

from The American Heritage® Dictionary of the English Language, 5th Edition.

  • adjective Having or involving three sides, countries, or parties.

from The Century Dictionary.

  • Having three sides.

from the GNU version of the Collaborative International Dictionary of English.

  • adjective (Geom.) Having three sides; being three-sided.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • adjective Having three sides.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • adjective involving three parties
  • noun a three-sided polygon
  • adjective having three sides

Etymologies

from The American Heritage® Dictionary of the English Language, 4th Edition

[From Latin trilaterus : tri-, tri- + latus, later-, side.]

from Wiktionary, Creative Commons Attribution/Share-Alike License

tri- +‎ lateral

Examples

  • We have for example promoted what we called a trilateral initiative between Afghanistan, Pakistan and Iran.

    CNN Transcript Jan 3, 2010

  • We have, for example, promoted what we call a trilateral initiative between Afghanistan, Pakistan and Iran.

    CNN Transcript Oct 25, 2009

  • We have, for example, promoted what we call a trilateral initiative between Afghanistan, Pakistan and Iran.

    CNN Transcript Oct 21, 2009

  • In fact, right now he's in what they call a trilateral meeting with Palestinian and Israeli leaders.

    CNN Transcript Nov 27, 2007

  • Canada, Erdogan intends to press US President Barack Obama on this issue: "The U.S. has been providing Turkey with actionable intelligence since late 2007 and initiated the establishment of what they call the trilateral mechanism -- a broad cooperative measure between Turkey, Iraq and the U.S. intended to restrict the movement of terror agents in the region."

    Sex and Politics and Screeds and Attitude

  • He's presiding over what are called trilateral security meetings.

    CNN Transcript Mar 24, 2002

  • He's presiding over what are called trilateral security meetings.

    CNN Transcript Mar 24, 2002

  • It's people who are in -- it's called trilateral because they're interested in Japan, Europe and the United States -- the relationship between the three major economic powers.

    Kissinger: A Biography

  • Talking to ISNA, Mehmanparast called the trilateral Istanbul meeting among Iranian, Turkish and Brazilian foreign ministers on Sunday "very positive" and said that "the meeting was a move forward and a positive act to materialize the Tehran declaration."

    APA

  • Word has leaked out that going into his "trilateral" with Palestine President Mahmoud Abbas and Israel Prime Minister Benjamin Netanyahu, President Obama was flustered and upset with their lack of progress with each other.

    Putting Lipstick on a Middle East Pig

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