An example of pop is the sound that a balloon makes when a pin is stuck into it. An example of pop is the act of sticking a pin into a balloon. Pop is a noise inside of your ears when pressure equalizes or when your eyes getting big when you see something impressive.
Para is defined as next to, beyond or assistant to. An example of para is parathyroid. An example of para is paranormal. An example of para is paralegal.
The definition of theoretical is something that is based on an assumption or opinion. An example of theoretical is lower interest rates will boost the housing market.