1. (used to introduce a logical conclusion) from that fact or reason or as a result
   "therefore X must be true"
   - hence, thence, thus, so 
2. As a consequence
   - consequently

1. And for this reason
   "You are too nice, and therefore tend to be exploited"
   - so

Encyclopedia: Therefore

• internal combustion
• internal control
• internal drive
• internal ear
• internal iliac artery
• internal iliac vein
• internal jugular vein
• internal maxillary artery
• internal medicine
• internal organ
• internal representation
• internal respiration
• internal revenue
• internal revenue agent
• Internal Revenue Service
• internal rhyme
• internal secretion
• internal spermatic artery
• internal-combustion engine
• internalisation
• internalise
• internality
• internalization
• internalize
• internally