1. (adv.) Towards the bottom of a hill; as, water runs downhill.

2. (a.) Declivous; descending; sloping.

3. (n.) Declivity; descent; slope.

adown aslant aslantwise aslope at a slant atilt below collapsing deciduous decline declined declining declivate declivitous declivity declivous decurrent descendant descending descent dip dipping down down south down-reaching downcoming downfalling downgate downgoing downgrade downline downright downsinking downstairs downstream downstreet downtown downward downwards downwith drooping drop dropping fall falling falling-off hang hanging off plumb on the descendant on the downgrade plummeting plunging rakingly sagging setting sinking slantingly slantways slantwise slaunchways slopeways slopingly submerging subsiding tipsily tottering tumbledown upgrade uphill