Definition of the future perfect noun from the Oxford Advanced Learner's Dictionary

 

the future perfect

 noun
noun
BrE
 
; NAmE
 
(also the future perfect tense)[singular](grammar)
 
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the form of a verb that expresses an action completed before a particular point in the future, formed in English with will have or shall have and the past participle
See the Oxford Advanced American Dictionary entry: the future perfect