the world > space > relative position > central condition or position > mark or be the centre of [verb (transitive)] > make into a nucleus or node (3)
intransitive and transitive. To form a nucleus; to group together into a nucleus.
gen. transitive. To form into a nucleus; to gather, collect, or bring together as or around a nucleus.
transitive. To make nodal in form or arrangement; to concentrate at certain points.