1. the act of prolonging something

e.g. there was an indefinite prolongation of the peace talks

Synonym: protractionperpetuationlengthening

2. the consequence of being lengthened in duration

Synonym: lengthinesscontinuationprotraction

3. amount or degree or range to which something extends

e.g. the wire has an extension of 50 feet

Synonym: extensionlengthiness