Definition of "po"

‘Pos’ or ‘chamber pots’ were provided under the beds.

1988, Richard Hoggart, A Local Habitation, 1918-40, Chatto & Windus, page 67

There are always several spitoons & pos [chamber pots] about the room & a loathesome smell of consumption, which I expect I shall catch.

1989, Leonard Woolf, edited by Frederic Spotts, Letters of Leonard Woolf, page 86

Shaking the last few drops from off the end he looked down in surprise at the great head of steam that brimmed above the po, belatedly apprised of just how icy the October garret was.

2016, Alan Moore, Jerusalem, Liveright, published 2016, page 44