diffusion of molecules through a semipermeable membrane from a place of higher concentration to a place of lower concentration until the concentration on both sides is equal
an empty area or space; "the huge desert voids"; "the emptiness of outer space"; "without their support he'll be ruling in a vacuum"
containing nothing; "the earth was without form, and void"
clear (a room, house, place) of occupants or empty or clear (a place or receptacle) of something; "The chemist voided the glass bottle"; "The concert hall was voided of the audience"