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1. The act of prolonging something
   "there was an indefinite prolongation of the peace talks";
   - protraction, perpetuation, lengthening
    
2. Amount, degree or range to which something extends
   - extension, lengthiness
    
3. The consequence of being lengthened in duration
   - lengthiness, continuation, protraction

Derived forms: prolongations

Type of: continuance, continuation, duration, length, longness

Encyclopedia: Prolongation