expand in WordNet English dictionary

1. exaggerate or make bigger
   "The charges were inflated"
   inflate  blow up  expand  amplify 
   
2. grow vigorously
   "The deer population in this town is thriving"; "business is booming"
   boom  thrive  flourish  expand 
   
3. add details, as to an account or idea; clarify the meaning of and discourse in a learned way, usually in writing
   "She elaborated on the main ideas in her dissertation"
   elaborate  lucubrate  expatiate  exposit  enlarge  flesh out  expand  expound  dilate 
   
4. become larger in size or volume or quantity
   "his business expanded rapidly"
   expand 
   
5. expand the influence of
   "The King extended his rule to the Eastern part of the continent"
   extend  expand 
   
6. make bigger or wider in size, volume, or quantity
   "expand the house by adding another wing"
   expand 
   
7. extend in one or more directions
   "The dough expands"
   expand  spread out