'backrest' definitions:

Definition of 'backrest'

From: WordNet
noun
A support that you can lean against while sitting; "the back of the dental chair was adjustable" [syn: back, backrest]

Definition of 'backrest'

From: GCIDE
  • backrest \back"rest\ n.
  • 1. a support that you can lean against while sitting.
  • Syn: back. [WordNet 1.5]