Dielectric - Not conducting direct electric current. Not able to conduct direct electric current, and therefore useful as an insulator.
You are far from stupid and as such are doubtless aware of the incredible usefulness of the interwebs? Good. There are dictionaries online, big man.
Be well.
thats exactly my point you think that thats all there is to know about dielectrics you dont know the first thing lol. you copied that from wiki, a dielectric is much more complicated than that
you have
dielectric fields, energies, charges, materials ect
here is something to explain it usefull
In terms of energy, high polarizability allows storage of large electric potential energy at low voltage cost, and also low electric field (i.e. no arcing).
The reason is that the dielectric material provides a new energy storage mechanism: re-arrangement of charge on the atoms in the material.