outwards
adv.away from the center of something or toward the outside. You use this to describe movement or direction that goes from the middle to the edge.
adv.away from the center or toward the exterior. Often used to describe physical movement or the direction of a force.
“The river flows outwards from the mountain.”
“The pressure inside the balloon caused the rubber to stretch outwards until it reached its maximum size.”
“The expansion of the universe is characterized by the movement of galaxies outwards from a central point, a phenomenon that continues to accelerate according to modern astrophysical observations.”
“From that one metropolitan oat, the mould spread outwards seeking the others, stretching towards them with its tubules.”
“The curtain is radiating the same amount inwards and outwards.”
From Middle English outwardes, from Old English ūtweardes; equivalent to outward + -s or out + -wards. Cognate with German auswärts.
Etymology adapted from Wiktionary, available under CC BY-SA 4.0.