Definition of pa noun from the Oxford Advanced Learner's Dictionary

 

pa

 noun
noun
BrE BrE//pɑː//
 
; NAmE NAmE//pɑː//
 
(old-fashioned, informal) Relations
 
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father I used to know your pa. See related entries: Relations Word Origin early 19th cent.: abbreviation of papa.
See the Oxford Advanced American Dictionary entry: pa