Definition of deed poll noun from the Oxford Advanced Learner's Dictionary

 

deed poll

 noun
noun
BrE
 
; NAmE
 
[uncountable, singular](British English)
 
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a legal document signed by only one person, especially in order to change their name Smith changed his name by deed poll to Jervis-Smith. Word Origin late 16th cent.: so named because the parchment was “polled” or cut cleanly, not indented at the edges as in the case of a deed made by two parties.