'Helpful' definitions:

Definition of 'helpful'

From: WordNet
adjective
Providing assistance or serving a useful function [ant: unhelpful]

Definition of 'Helpful'

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]