inattention /ˌɪnəˈtɛnʃən/ noun Learner's definition of INATTENTION
[noncount]
: failure to carefully think about, listen to, or watch someone or something : lack of attention注意力不集中;疏忽;漫不经心 — inattentive
/ˌɪnəˈtɛntɪv/ adjective [more inattentive; most inattentive]
— inattentiveness
noun [noncount]