From WordNet (r) 2.0 (August 2003) [wn]:
Jehovah
n 1: a name for the God of the Old Testament as transliterated
from the Hebrew consonants YHVH [syn: Yahweh, YHWH,
Yahwe, Yahveh, YHVH, Yahve, Wahvey, Jahvey,
Jahweh, Jehovah, JHVH]
2: terms referring to the Judeo-Christian God [syn: Godhead,
Lord, Creator, Maker, Divine, God Almighty,
Almighty, Jehovah]
From The Collaborative International Dictionary of English v.0.48 [gcide]:
Jehovah \Je*ho"vah\, n. [Heb. usually y[e^]h[=o]v[=a]h (with the
vowel points of [a^]d[=o]n[=a]i Lord), sometimes (to avoid
repetition) y[e^]h[=o]vih (with the vowel points of
[e^]l[=o]h[imac]m God); but only the four Heb, consonants
yhvh are conceded to be certainly known.]
A Scripture name of the Supreme Being, by which he was
revealed to the Jews as their covenant God or Sovereign of
the theocracy; the "ineffable name" of the Supreme Being,
which was not pronounced by the Jews.
[1913 Webster]
From The Collaborative International Dictionary of English v.0.48 [gcide]:
Yahweh \Yah"weh\ (y[aum]"w[e^]), Yahwe \Yah"we\, prop. n. Also
Jahveh \Jah"veh\ (y[aum]"w[e^]), Jahve \Jah"ve\, Yahve \Yahve\,
Yahveh \Yahveh\, etc.
A modern transliteration of the Hebrew word translated
Jehovah in the Bible; -- used by some critics to
discriminate the tribal god of the ancient Hebrews from the
Christian Jehovah. Yahweh or Yahwe is the spelling now
generally adopted by scholars.
Syn: Yahwe, Yahveh, Wahvey, Jahve, Jahveh, Jahvey, Jahweh,
Jehovah.
[Webster 1913 Suppl. +WordNet 1.5 +CM] Jahvism