Definify.com
Webster 1913 Edition
Disagreer
Disˊa-gre′er
(dĭsˊȧ-grē′ẽr)
, Noun.
 One who disagrees. 
Hammond.
 Definition 2025
disagreer
disagreer
English
Noun
disagreer (plural disagreers)
-  One who disagrees.
- (Can we find and add a quotation of Hammond to this entry?)