the GNU version of the Collaborative International Dictionary of English
adj. Full of use, advantage, or profit; producing, or having power to produce, good; serviceable for any end or object; helpful toward advancing any purpose; beneficial; profitable; advantageous.
The Century Dictionary and Cyclopedia
Being of use, advantage, or profit; valuable for use; suited or adapted to a purpose; producing or having power to produce good; beneficial; profitable; serviceable.
Useful invention.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
adj. being of use or service
adj. having a useful function
Word Usage
"In this workshop, children are invited to make educational and useful toys - useful in the sense that they help with a childs early development, providing stimulation, exercise, use of the senses, and learning of skills."