One of the mysteries of the English language finally explained.
1Also with capital initials. The most exalted level of heaven, especially the highest and most holy or blessed of the hierarchical series of heavens described in Jewish and Islamic theology.
2Figurative. A place or state of supreme bliss. Now chiefly in "in seventh heaven": ecstatically happy.
Late Middle English; earliest use found in Ipotis. From seventh + heaven. Compare post-classical Latin septimum caelum, Hellenistic Greek ἕβδομος οὐρανός (2nd cent.), post-biblical Hebrew hārāqīaʿ haššĕḇiʿ i (used in the Midrash (e.g. at Psalm 68:5) to gloss ʿărāḇōṯ highest heaven). With the underlying concept of seven heavens compare also Arabic sabʿa samāwāt seven heavens. Compare earlier heaven of heavens.
seventh heaven/ˌsɛvnθ ˈhɛvn/
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