adjective 1.being of
use or service; serving some purpose; advantageous, helpful, or of good effect:
a useful member of society. 2.of practical
use, as for doing work; producing material results; supplying common needs:
the useful arts; useful work.
Related forms use·ful·ly, adverb
use·ful·ness, noun
un·use·ful, adjective
un·use·ful·ly, adverb
un·use·ful·ness, noun
Synonyms
1, 2. profitable, efficacious, beneficial.
Antonyms
1, 2. useless.