Is glare concrete or abstract noun?

"Glare" is primarily considered an abstract noun, as it refers to a strong, harsh light or brightness that can be perceived but not physically touched. It can also denote the discomfort or annoyance caused by such light, which further emphasizes its abstract nature. However, in specific contexts, it can be used in a more concrete sense, such as describing a glare from a surface. Overall, its most common usage aligns with the characteristics of an abstract noun.