'Strengthener' definitions:

Definition of 'strengthener'

From: WordNet
noun
A device designed to provide additional strength; "the cardboard backing was just a strengthener"; "he used gummed reinforcements to hold the page in his notebook" [syn: strengthener, reinforcement]

Definition of 'Strengthener'

From: GCIDE
  • Strengthener \Strength"en*er\, n. One who, or that which, gives or adds strength. --Sir W. Temple. [1913 Webster]