c. 1400, "to give off vapor, flow out," from Old French exalter (10c.), from Latin exaltare "raise, elevate," from ex "out, out of, from within" (see ex-) + altus "high," literally "grown tall," from PIE root *al- (2) "to grow, nourish." From early 15c. as "to elevate in rank or honor;" also "glorify, praise, extol." Related: Exalted; exalting.
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