Therefore is defined as because something happened.adverb
An example of therefore is saying that you got a cold and then had to stay home from work.YourDictionary definition and usage example. Copyright © 2013 by LoveToKnow Corp.
Origin: ME ther fore: see there & foreas a result of this or that; for this or that reason; consequently; hence: often used as a conjunctive adverb
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Origin: Middle English : there, there; see there + for, fore, fore; see for.