1. (adv.) Down the stairs; to a lower floor.

2. (a.) Below stairs; as, a downstairs room.

ailing at a discount at a reduction bad below below deck below standard below the mark belowstairs critically ill down down below downstairs faint faintish feeling awful feeling faint feeling something terrible ill in danger indisposed infra laid low mortally ill not quite right off off-color out of sorts rocky seedy sick sick unto death sickish substandard taken ill under under the weather underfoot unwell