prolongation

Noun
  1. The act of prolonging something (synset 101020308)
    "there was an indefinite prolongation of the peace talks"
    is a type of: continuance, continuation - the act of continuing an activity without interruption
    same as: lengthening, perpetuation, protraction
  2. Amount or degree or range to which something extends (synset 105140800)
    "the wire has an extension of 50 feet"
    is a type of: longness - the property of being of long spatial extent
    subtypes: coextension - equality of extension or duration
    same as: extension, lengthiness
  3. The consequence of being lengthened in duration (synset 105059047)
    is a type of: duration, length - continuance in time
    subtypes: fermata - (music) a prolongation of unspecified length on a note or chord or rest
    same as: continuation, lengthiness, protraction

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