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Definition of Speaking of
1. Adverb. (colloquial) Speaking of which; relatedly; (non-gloss definition used to introduce a related topic.) ¹
¹ Source: wiktionary.com
|  | 
1. Adverb. (colloquial) Speaking of which; relatedly; (non-gloss definition used to introduce a related topic.) ¹
¹ Source: wiktionary.com