Definition of: inattentive

(in′ə·ten′tiv) adjective
Neglecting or failing to pay attention; careless.
—in′at·ten′·tive·ly adverb
—in′at·ten′tive·ness noun Synonyms: absent, absent–minded, careless, heedless, inconsiderate, listless, neglectful, negligent, regardless, remiss, restless, unmindful, unobservant. See ABSTRACTED. Antonyms: attentive, careful, considerate, heedful, listening, noticing, noting, observing, regardful, studious, thoughtful, watchful.