Learner's definition of VISION
1 [noncount] : the ability to see: sight or eyesight
She has good/poor vision.
She has normal vision. = She has 20/20 vision.
a vision test
The pole was right in my line of vision. [=the area in front of my eyes]
2 [count] : something that you imagine: a picture that you see in your mind
We had visions of fame and fortune.
the architect's vision for the new building
She had a clear vision of what she wanted to do.
3 [count] : something that you see or dream especially as part of a religious or supernatural experience 4 : a clear idea about what should happen or be done in the future
5 [count] : a beautiful person or thing: a lovely sight— used especially of a woman 6 [noncount], British : the picture that is shown on a television or in a film