Commentary: the stock of basic facilities and capital equipment needed for the functioning of a country or area
America's infrastructure relies heavily on oil.
Infrastructure can refer to roads, bridges, and rail lines necessary for industrial economy.
WordNet 2.0 Sense Numbers: 2
Commentary: the basic structure or features of a system or organization
The financial infrastructure the large corporation was composed of many different departments.
Environmentalism has an infrastructure of groups, committees, and admirers.
WordNet 2.0 Sense Numbers: 1