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Old English glowan "to glow, shine as if red-hot," from Proto-Germanic base *glo- (cf. Old Saxon gloian, Old Frisian gled "glow, blaze," Old Norse gloa, Old High German gluoen, German glühen "to glow"), from PIE *ghel- (see glass). Figuratively from late 14c. Related: Glowed; glowing.
mid-15c., from glow (v).
Mild intoxication; Tiddliness: After a couple of bourbons she had a nice glow (1940s+)