1. (

• dilate ,
• distend

) become wider; "His pupils were dilated" ;

2. (

• elaborate ,
• lucubrate ,
• expatiate ,
• exposit ,
• enlarge ,
• flesh_out ,
• expand ,
• expound ,
• dilate ,

) 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" ;