A stream channel is the physical confine of a stream (river) consisting of a bed and stream banks.

But she had returned in body only, her mind having long since fled its physical confines.

A stream bed is the channel bottom of a stream, river or creek; the physical confine of the normal water flow.

This is how the traditional cuisine evolved and spread beyond the physical and creative confines of the palace, even to the most modest corners of the state.

Much of the work of the Department, of course, goes on outwith the physical confines of these rooms.

They wish to be freed of the physical, social and mental confines of their lives as patients and romp unselfconsciously as children.

Not being constrained by the physical confines of living in a shell allows this species to grow much larger than other hermit crabs in the family Coenobitidae.

I poured into myself, horrified at how cold and stiff the physical confines of my soul had become.

They had lost their urge to transcend physical confines and in so doing had lost pride - real pride, also.

Channel - the physical confine of a river, slough or ocean strait consisting of a bed and banks.