In other words, describing things from first principles...assuming that anyone reading your work has only a very limited understanding of the world and no pre-conceptions at all.
These definitions I've found are from a poem by Craig Raine called 'A Martian Sends A Postcard Home,'
'Mist is when the sky is tired of flight.'
'Rain is when the earth is television.'
'Time is tied to the wrist.'
'At night, all the colours die.'
This style of poetry is actually called Martian Poetry and is very effective at creating striking and startling imagery - I suppose that's why I use it a lot in my own work and as the basis for exercises in my poetry workshops.
