D defs.my
Entry 1 sense Webster, 1913

Trilingual

/trī-lĭng′gwəl/ · Tri·lin·gual · IPA /tɹaɪ̯ˈlɪŋ.ɡwəl/
01 a. Containing, or consisting of, three languages; expressed in three languages.
  1. 1.
    Containing, or consisting of, three languages; expressed in three languages.
    “The much-noted Rosetta stone . . . bears upon its surface a trilingual inscription.” I. Taylor.