v.
1.extend in one or more directions
2.become larger in size or volume or quantity
3.make bigger or wider in size, volume, or quantity
4.grow stronger
5.exaggerate or make bigger
6.add details, as to an account or idea
7.expand the influence of
Idiom of the Day
catch on
to understand something, to learn about something
I was finally able to catch on and understand the math problem.