increasing in area or volume or bulk or range; " an expanding universe"; " an expanding economy"

of Expand

That expands, or may be expanded; extending; spreading; enlarging.

Stamens indefinite, expanding at the upper end and bearing 2 anthers. – The Medicinal Plants of the Philippines by T. H. Pardo de Tavera

Outside the farm, vehicles were ever setting down fresh families with troops of children, whose sea of fair heads was always expanding – Fruitfulness Fecondite by Emile Zola

When we had learned all that our expanding but limited intelligence could teach us of the other parts of the universe, and when our minds were ripe for more knowledge, we found this magnificent object lesson, which had been waiting for us all these years. – Daybreak: A Romance of an Old World by James Cowan

We know that in all volcanic, and the greater part of all subterranean, action, temperatures are continually changing, and therefore masses of rock must be expanding or contracting, with infinite slowness, but with infinite force. – The Ethics of the Dust by John Ruskin

States still maintain and employ armed forces as a means of promoting and expanding as well as of defending, their welfare and interests. – Sound Military Decision by U.s. Naval War College