What is a point? In geometry, what is a point?
I have seen Euclid's definition and definitions in some text books. Nowhere have I found a complete notion. And then I made a definition out from everything that I know regarding maths. Now, I need to know what I know is correct or not.
One book said, if we make a dot on a paper, it is a model for a point.
Another said it has no size. Another said, everybody knows what it is.Another said, if placed one after another makes a straight line.Another said, dimensionless.Another said, can not be seen by any means. 

A point is a 'mind-erected' entity found in the ‘2 dimensional space’ or the ‘3 dimensional space’ model that is constructed by the human-brain. Any point is also the fundamental 'mind-erected entity' of geometry that is size-less, invisible and indivisible, yet points have the power to generate each of the 2D and 3D objects constructed by the brain. 
size-less : Any point is too small to exist physically, we mean this when we say that any point is size-less.
‘2 dimensional space’ model : On seeing a flat wooden slab, we can think of it getting thinner 
and thinner to such an extent that it becomes thickness-less [As we move forward in future, the 
flat wooden slab gets thinner and thinner and along the future it has always been existing. At 
thickness-less, it might seem that the wooden is not existing. Since, there is no obstruction in 
imagining the existence of an invisible wooden block; therefore we are free  to conclude that at 
thickness-less the wooden exists.]. We take this thickness-less surface directly in front of our 
mind, letting it to stand vertically and then along the boundary we extend it indefinitely. Let this 
expansion to finish instantaneously,  then what we have got is the ‘2 dimensional space’.
‘3 dimensional space’ model : When residing in a box, if anybody kicks out everything from 
inside the box including himself, then we get empty space in the box. We then throw the box 
away and pick up the empty space. We place the space in front of our mind, and enlarge it 
indefinitely. Let this expansion to finish instantaneously,  then what we have got is the 
‘3 dimensional space’.
‘constructed by the human-brain’ : constructed in the mind 
