dilate

Verb

• 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
    

• become wider
  • His pupils were dilated
    

Related words

• Synonyms: 
  elaborate , lucubrate , expatiate , exposit , enlarge , flesh out , expand , expound , distend
• Antonyms: 
  abridge , foreshorten , abbreviate , shorten , cut , contract , reduce