For that reason or cause; consequently or hence.(adverb)
American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Use "therefore" in a sentence
"_Hence, therefore, why_, etc., used in making an inference or in expressing cause -- as, It is dark, _hence_, or _therefore_, the sun is down; _Why_ is it dark?"
"The term therefore refers to symbolic or cultural activities which do not contribute to capitalist production and accumulation and which potentially constitute a "radical negation" of productivist society."
"Wrapped up in the term therefore is the idea of a "biodiversity crisis"."