adj. Not providing help or assistance; not helpful.
The Century Dictionary and Cyclopedia
Affording no aid. Unable to help one's self; helpless.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
adj. providing no assistance
Word Usage
"Just to the left of the bulletin board, equally unread and unhelpful, is a small sign which warns the public against intimidating or attacking council staff."