expatiation

from WordNet (r) 3.0 (2006)
expatiation
    n 1: a discussion (spoken or written) that enlarges on a topic
         or theme at length or in detail
    
from The Collaborative International Dictionary of English v.0.48
Expatiation \Ex*pa`ti*a"tion\, n.
   Act of expatiating.
   [1913 Webster]
    

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