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The four Hebrew letters usually transliterated as YHWH or JHVH, used as a biblical proper name for God.
(Bible) Bible the Hebrew name for God revealed to Moses on Mount Sinai (Exodus 3), consisting of the four consonants Y H V H (or Y H W H) and regarded by Jews as too sacred to be pronounced. It is usually transliterated as Jehovah or Yahweh. Sometimes shortened to: Tetragram
[C14: from Greek, from tetragrammatos having four letters, from tetra- + gramma letter]
Tet•ra•gram•ma•ton(ˌtɛ trəˈgræm əˌtɒn)
the Hebrew word for God, consisting of the four letters yod, he, vav, and he, transliterated consonantally usu. as YHVH, now pronounced as Adonai in substitution for the original pronunciation forbidden since the 2nd or 3rd century B.C. Compare Yahweh.
[1350–1400; Middle English < Greek tetragrámmaton, n. use of neuter of tetragrámmatos having four letters]