Forgetting your line
There is no definition,its a made up word or it is a easy going easy saying!
push up to go flat down with your hands on the ground going up and down
The direction you are going in.
The definition of descending is that something is falling or its going down
By definition a line keeps going forever.
If you meant Aliyah (עליה), it means "going up" "ascending" or "emmigrating to Israel"
Going backwards.
A way of going about something.
It means going down.
The "bull market" is generally defined as a market that is going up. It's opposite, a "bear market", is defined as a market that is going in the opposite direction, i.e. down.
The definition of continuous is never stopping or ending.
You are probably going for 'operational definition'.