What does it mean to comprehend?

I am doing a project on reading comprehension. First thing I had to determine was what does it mean to comprehend? Comprehension involves all of the processes of the brain when reading. Comprehension means to construct meaning. A student may struggle with comprehension for many different reasons such as decoding, prior knowledge, vocabulary, working memory, lack of attention control, and drawing inferences. Last semester I had two students that struggled with reading comprehension. One of the students is dyslexic therefore, in order to help her comprehend we allowed her extra time on assignments and she frequently used colored paper (which helps dyslexic students). I was intrigued by another student. He was not dyslexic, but he really struggled with reading comprehension. Also when I asked other teachers about him I learned that he did well in math except when there was a word problem. This made me wonder where his struggle was. After reading some of his reflections after he read I found that he just was not understanding even the most basic comprehension in what he read. I honestly do not know where he was struggling to comprehend, but reading about memory made me think that maybe this is where the gap was. Unfortunately I no longer have this student so I can't see what type of intervention has helped him. In the future I will definitely be on the look out for comprehension struggles in my students and so my best to give them techniques to assist with their comprehension struggles.