'Helpfulness' definitions:

Definition of 'helpfulness'

From: WordNet
noun
The property of providing useful assistance
noun
Friendliness evidence by a kindly and helpful disposition [syn: kindliness, helpfulness]

Definition of 'Helpfulness'

From: GCIDE
  • Helpful \Help"ful\, a. Furnishing help; giving aid; assistant; useful; salutary. [1913 Webster]
  • Heavens make our presence and our practices Pleasant and helpful to him! --Shak. -- {Help"ful*ly}, adv. -- {Help"ful*ness}, n. --Milton. [1913 Webster]