adj. 1. a. Being or having no beneficial use; ineffective: This pen is useless because it's out of ink. See Synonyms at futile. b. Having no purpose or reason; pointless; to no avail: It's useless to argue over matters of taste. 2. Incapable of acting or functioning effectively; ineffectual or inept: He panics easily and is useless in an emergency. useless·ly adv. useless·ness n. |
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