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Webster 1913 Edition
Prolongate
Pro-lon′gate
,Verb.
 T.
 [
imp. & p. p. 
Prolongated
; p. pr. & vb. n. 
Prolongating
.] To prolong; to extend in space or in time. 
[R.] 
Webster 1828 Edition
Prolongate
PROLON'GATE
,Verb.
T.
  1.
  To extend in time.  [Little used.]Definition 2025
prolongate
prolongate
English
Verb
prolongate (third-person singular simple present prolongates, present participle prolongating, simple past and past participle prolongated)