A particular way of considering something.
To think about a situation or problem in a wise and reasonable way.
To compare something to other things so that it can be accurately and fairly judged.
The way that objects appear smaller when they are further away and the way parallel lines appear to meet each other at a point in the distance.
An object or person that is in perspective has the correct size and position in comparison with other things in the picture.
An object or person that is out of perspective does not have the correct size or position in comparison with other things in the picture, and therefore does not look real or natural.
(Definition of perspective from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)
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