noun
[ usually pl. ] a mental problem that people may have from birth, or that may be caused by illness or injury, that affects their ability to learn things
noun
[ usually pl. ] a mental problem that people may have from birth, or that may be caused by illness or injury, that affects their ability to learn things
Oxford Advanced Learner's English Dictionary. Оксфордский английский словарь для изучающик язык на продвинутом уровне. 2005