Look up: therefore

1. therefore
   [adv] - (used to introduce a logical conclusion) from that fact or reason or as a result
   Found on http://www.webdictionary.co.uk/definitio
   
   
2. Therefore
   There'fore conj. & adverb [ Middle English therfore . See There , and Fore , adverb , For , and confer Therefor .] 1. For that or this reason, referring to something previously state...
   Found on http://www.encyclo.co.uk/webster/T/41
   
   
3. therefore
   hence adverb (used to introduce a logical conclusion) from that fact or reason or as a result; `therefore X must be true`; `the eggs were fresh and hence satisfactory`; `we were young and thence optimistic`...
   Found on http://wordnetweb.princeton.edu/perl/web
   
   
4. Therefore
   • (adv.) For that or this reason, referring to something previously stated; for that. • (adv.) Consequently; by consequence.
   Found on http://thinkexist.com/dictionary/meaning