Definify.com
Webster 1913 Edition
Interestedness
In′ter-est-ed-ness
,Noun.
 The state or quality of being interested; selfishness. 
Richardson.
 Definition 2025
interestedness
interestedness
English
Noun
interestedness (uncountable)
-  The state or quality of being interested, or having an interest; selfishness.
- (Can we find and add a quotation of Richardson to this entry?)