1.AdjectiveWithout use or the possibility to be used.
"This fork's prongs are bent. It's useless now."
2.AdjectiveUnhelpful, not useful; pointless (of an action).
"I think it's useless to keep this discussion going. It's like talking to a brick wall.; I tried my best to make him quit smoking, but my efforts were useless. He now smokes six packs a day."
3.AdjectiveGood-for-nothing; not dependable.
"Bill never mows the lawn, takes out the trash or anything. He's useless, but I love him anyways."
4.AdjectiveOf a person, Unable to do well at a particular task or endeavor.
"My brother is useless at most computer games, but he is an awesome PS2 player.; Why do you keep trying? You're obviously useless at it."