(countable) An aspect is a view of something, often something non-physical, such as an idea or a problem.
In Chapter 2 we look at processor size. In Chapter 3 we consider other aspects of processor design.
(grammar) In English grammar, aspect is expressed as the form of a verb group showing the speaker's view of whether the situation the clause describes is complete or happens again and again.
I go and I'm going are both in the present tense, but I'm going is in the progressive aspect as well.