D defs.my
Entry 2 senses Webster, 1913

Prolongation

· Pro·lon·ga·tion · IPA /pɹoʊˌlɔŋˈ(ɡ)eɪʃən/
01 n. The act of lengthening in space or in time; extension; protraction.
  1. 1.
    The act of lengthening in space or in time; extension; protraction.
  2. 2.
    That which forms an additional length.