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tri·lat·er·al (tr -l t r- l). adj. Having or involving three sides, countries, or parties. [ From Latin trilaterus : tri-, tri- + latus, later-, side.] tri·lat er·al·ly adv. trilateral ...
http://www.thefreedictionary.com/trilateral
The Trilateral Commission is a non-governmental, non-partisan discussion .... meaning schools, universities, church and so on ? they're not doing their job, [the ...
http://www.thefreedictionary.com/trilateral
having three sides or parties <trilateral business ventures> <trilateral discussions >. See trilateral defined for English-language learners ». See trilateral defined ...
http://www.duden.de/rechtschreibung/trilateral
Origin: 1650?60; < Latin trilater(us) three-sided + -al1. See tri-, lateral. Related forms. tri·lat·er·al·i·ty, noun. tri·lat·er·al·ly, adverb. Dictionary.com Unabridged
http://www.duden.de/rechtschreibung/trilateral